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Academic literature on the topic 'Martensitic transformations'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 August 2024

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Journal articles on the topic "Martensitic transformations"

1

Nagy, Erzsebet, Márton Benke, Árpád Kovács, and Valéria Mertinger. "Orientation Relations of Martensitic Transformations in FeMnCr Steels." Materials Science Forum 885 (February 2017): 165–70. http://dx.doi.org/10.4028/www.scientific.net/msf.885.165.

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The crystallographic orientation relations of phases forming during the martensitic transformation determine the properties of alloys. In TRIP/TWIP steels, the circumstances of thermomechanical treatment (e.g. temperature, deformation) define the forming of martensites of different origins. Due to the thermomechanical treatment, thermally induced martensite (εTH), strain induced martensite (εD) and α’ martensite phases are present in the samples besides the austenite. The proportion of martensites in the sample is defined by the parameters of treatment. The thermally and strain induced martensites which are simultaneously present in the alloy at room temperature can be differentiated by the orientation relations.The martensitic transformations were followed by different methods in FeMn alloys with different Cr content. The macroscopic crystallographic anisotropy was measured by X-ray diffraction method; the microscopic one was examined by EBSD. The cognition of phenomenon observed in the texture image in different scales helps determine the possible origin of martensites.

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Adiguzel, Osman. "Martensitic Transformation and Microstructural Characteristics in Copper Based Shape Memory Alloys." Key Engineering Materials 510-511 (May 2012): 105–10. http://dx.doi.org/10.4028/www.scientific.net/kem.510-511.105.

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Martensitic transformations are first order solid state phase transitions and occur in the materials on cooling from high temperature. Shape memory effect is an unusual property exhibited by certain alloy systems, and based on martensitic transformation. The shape memory property is characterized by the recoverability of previously defined shape or dimension when they are subjected to variation of temperature. The shape memory effect is facilitated by martensitic transformation, and shape memory properties are intimately related to the microstructures of the materials. Martensitic transformations occur as martensite variant with the cooperative movement of atoms on {110}β - type plane of austenite matrix. Martensitic transformations have diffusionless character, and the atomic movement is confined to interatomic lengths in the materials. The basic factors which govern the martensitic transformation are Bain distortion and homogeneous shears. Copper based alloys exhibit this property in metastable β-phase field.

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Waitz, T., K. Tsuchiya, T. Antretter, and F. D. Fischer. "Phase Transformations of Nanocrystalline Martensitic Materials." MRS Bulletin 34, no. 11 (November 2009): 814–21. http://dx.doi.org/10.1557/mrs2009.231.

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AbstractThe physical phenomena and engineering applications of martensitic phase transformations are the focus of intense ongoing research. The martensitic phase transformation and functional properties such as the shape-memory effect and superelasticity are strongly affected by the crystal size at the nanoscale. The current state of research on the impact of crystal size on the phase stability of the martensite is reviewed summarizing experimental results of various nanostructured martensitic materials and discussing the corresponding theoretical approaches. The review outlines the effects of crystal size on the complex morphology of the martensite, leading to interface structures not encountered in coarse-grained bulk materials. The unique shape-memory properties of martensitic materials can persist even at the nanoscale. Nanocrystalline martensitic materials can be processed to obtain tailored functional properties in combination with enhanced strength. Structural changes of metallic nanowires are similar to those arising by martensitic phase transformations and also can lead to shape-memory effects, as predicted by atomistic simulations.

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Meng, Q. P., and N. Chen. "Interfacial Structural Modification of Martensitic Transformations." Materials Science Forum 561-565 (October 2007): 2309–12. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.2309.

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The free energy function of martensitic transformation is established using Landau polynomial. According to the free energy function, the interfacial structural modification of austenite-martensite with the chemical driving force of martensitic transformation and elastic constants of materials is discussed. Some characteristics of martensitic transformation, such as the difference between thermoelastic and nonthermoelastic martensitic transformation, martensitic growth, are explained.

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Song, Ren Bo, Yu Pei, Yi Su Jia, Zhe Gao, Yang Xu, and Peng Deng. "Effect of Different Deformation on Microstructures and Properties in 304HC Austenitic Stainless Steel Wire." Materials Science Forum 788 (April 2014): 323–28. http://dx.doi.org/10.4028/www.scientific.net/msf.788.323.

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Two different components of Φ5.5mm 304HC stainless steel wires were drawn at room temperature. After the drawing tests, hard wires of Φ4.5mm, Φ3.8mm and Φ3.45mm were obtained. During the process of drawing, the stacking fault energy of the metastable austenitic stainless steel was low, which have caused strain-induced martensitic transformation. By XRD, TEM, martensitic volume fraction measurement, etc., the results show that the strain-induced martensitic transformations of the two different components were different significantly. When the deformation amount was controlled at 33% or less, a small amount of γ → α ' martensitic transformations of two steels has occurred. While the deformation arrived at 52% or more, a large amount of γ → α ' martensitic transformation has occurred. The stainless steel which has a higher Cu content will have a lower martensite content, which results from the reason that Cu has a strong inhibitory effect on the martensitic formation. In addition, the martensitic transformation can also influence properties. With the accumulation of strain, deformation mainly occurs in martensitic structure, which reduces the plasticity.

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Vermaut, Philippe, Anna Manzoni, Anne Denquin, Frédéric Prima, and Richard Portier. "Unexpected Constrained Twin Hierarchy in Equiatomic Ru-Based High Temperature Shape Memory Alloy Martensite." Materials Science Forum 738-739 (January 2013): 195–99. http://dx.doi.org/10.4028/www.scientific.net/msf.738-739.195.

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Among the different systems for high temperature shape memory alloys (SMA’s), equiatomic RuNb and RuTa alloys demonstrate both shape memory effect (SME) and MT temperatures above 800°C. Equiatomic compounds undergo two successive martensitic transformations, β (B2) → β’ (tetragonal) → β’’ (monoclinic), whereas out of stoechiometry alloys exhibit a single transition from cubic to tetragonal. In the case of two successive martensitic transformations, we expect to have a finer microstructure of the second martensite because it is supposed to develop inside the smallest twin elements of the former one. In equiatomic Ru-based alloys, if the first martensitic transformation is “normal”, the second one gives different unexpected microstructures with, for instance, twins with a thickness which is larger than the smallest spacing between twin variants of the first martensite. In fact, the reason for this unexpected hierarchy of the twins size is that the second martensitic transformation takes place in special conditions: geometrically, elastically and crystallographically constrained.

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Hsu, T. Y., Q. P. Meng, Yong Hua Rong, and Xue Jun Jin. "Perspective in Application of the Phase Field Theory to Smart Materials Performance." Materials Science Forum 475-479 (January 2005): 1909–14. http://dx.doi.org/10.4028/www.scientific.net/msf.475-479.1909.

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Previous works on the kinetics of martensitic transformation in shape memory materials through Landau theory and the application of the phase field theory to study phase transformations in alloys are briefly reviewed. Based on field model to improper martensitic transformation proposed by Wang and Khachaturyan in 1997, a simpler model is suggested. Using this model, the motion speed and shape of parent/martensite and martensite-martensite interface are quantitatively described, which are important factors to be considered in design of smart device using shape memory materials as a main element.

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de Bortoli, Daniel, Fauzan Adziman, Eduardo A. de Souza Neto, and Francisco M. Andrade Pires. "Constitutive modelling of mechanically induced martensitic transformations." Engineering Computations 35, no. 2 (April 16, 2018): 772–99. http://dx.doi.org/10.1108/ec-03-2017-0087.

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Purpose The purpose of this work is to apply a recently proposed constitutive model for mechanically induced martensitic transformations to the prediction of transformation loci. Additionally, this study aims to elucidate if a stress-assisted criterion can account for transformations in the so-called strain-induced regime. Design/methodology/approach The model is derived by generalising the stress-based criterion of Patel and Cohen (1953), relying on lattice information obtained using the Phenomenological Theory of Martensite Crystallography. Transformation multipliers (cf. plastic multipliers) are introduced, from which the martensite volume fraction evolution ensues. The associated transformation functions provide a variant selection mechanism. Austenite plasticity follows a classical single crystal formulation, to account for transformations in the strain-induced regime. The resulting model is incorporated into a fully implicit RVE-based computational homogenisation finite element code. Findings Results show good agreement with experimental data for a meta-stable austenitic stainless steel. In particular, the transformation locus is well reproduced, even in a material with considerable slip plasticity at the martensite onset, corroborating the hypothesis that an energy-based criterion can account for transformations in both stress-assisted and strain-induced regimes. Originality/value A recently developed constitutive model for mechanically induced martensitic transformations is further assessed and validated. Its formulation is fundamentally based on a physical metallurgical mechanism and derived in a thermodynamically consistent way, inheriting a consistent mechanical dissipation. This model draws on a reduced number of phenomenological elements and is a step towards the fully predictive modelling of materials that exhibit such phenomena.

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Guo, Zheng Hong, Yong Hua Rong, S. Y. Gu, and Ji Hua Zhang. "The Investigation of Internal Friction on Antiferromagnetic Transition and Martensitic Transformation in Mn-Fe(Cu) Alloys." Solid State Phenomena 184 (January 2012): 378–83. http://dx.doi.org/10.4028/www.scientific.net/ssp.184.378.

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The internal friction and elastic modulus variations caused by the structural rearrangement fcc↔fct in Mn-Fe (Cu) antiferromagnetic alloys were studied in this paper. Antiferromagnetic transition exhibits weak first-order features due to the formation of microtwins by modulus softening mechanism. Antiferromagnetic transition also assists subsequent transformation to form twinned martensite. The small hysteresis between direct and reveres martensitic transformations indicates the thermoelastic feature. Both the martensitic and its reverse transformations also depend on the modulus softening mechanism.

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Basak, Anup, and Valery I. Levitas. "An exact formulation for exponential-logarithmic transformation stretches in a multiphase phase field approach to martensitic transformations." Mathematics and Mechanics of Solids 25, no. 6 (February 14, 2020): 1219–46. http://dx.doi.org/10.1177/1081286520905352.

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A general theoretical and computational procedure for dealing with an exponential-logarithmic kinematic model for transformation stretch tensor in a multiphase phase field approach to stress- and temperature-induced martensitic transformations with N martensitic variants is developed for transformations between all possible crystal lattices. This kinematic model, where the natural logarithm of transformation stretch tensor is a linear combination of natural logarithm of the Bain tensors, yields isochoric variant–variant transformations for the entire transformation path. Such a condition is plausible and cannot be satisfied by the widely used kinematic model where the transformation stretch tensor is linear in Bain tensors. Earlier general multiphase phase field studies can handle commutative Bain tensors only. In the present treatment, the exact expressions for the first and second derivatives of the transformation stretch tensor with respect to the order parameters are obtained. Using these relations, the transformation work for austenite ↔ martensite and variant ↔ variant transformations is analyzed and the thermodynamic instability criteria for all homogeneous phases are expressed explicitly. The finite element procedure with an emphasis on the derivation of the tangent matrix for the phase field equations, which involves second derivatives of the transformation deformation gradients with respect to the order parameters, is developed. Change in anisotropic elastic properties during austenite–martensitic variants and variant–variant transformations is taken into account. The numerical results exhibiting twinned microstructures for cubic to orthorhombic and cubic to monoclinic-I transformations are presented.

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Dissertations / Theses on the topic "Martensitic transformations"

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Gao, Yipeng. "Transformation Pathway Network Analysis for Martensitic Transformations." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1385978073.

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Barrera, Noemi. "Intermittency in reversible martensitic transformations." Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22562/document.

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Les Transformation Martensitiques (TM) sont des transitions du premier ordre entre des phases cristallines qui caractérisent une classe intéressante de matériaux intelligents, les Alliages à Mémoire de Forme (AMF). Ces alliages métalliques furent découverts dans les années 1930 environ. Ils sont surtout intéressants car ils combinent deux effets particuliers : l'effet de mémoire de forme et la pseudo-élasticité. L'effet mémoire de forme consiste à mémoriser une configuration particulière et la retrouver après des cycles thermiques ou mécaniques. La Pseudo-Elasticité consiste à rejoindre des niveaux de déformation très grands qui sont, en général, plus typiques du caoutchouc que des métaux. Dans cette thèse, nous avons traité la caractérisation des transformations martensitiques en analysant des points de vue différents. La compréhension du fonctionnement des AMFs est fondamentale pour plusieurs types d'applications industrielles. Elle constitue encore un domaine de recherche très ouvert. (...)
This thesis deals with the characterization of Martensitic Transformations (MT) that are first order phase transitions among different solid states with different crystalline structures. These transitions are at the basis of the behavior of a class of smart materials, called Shape Memory Alloys (SMA). This work combines an experimental study of a mechanically-induced martensitic transformation in a Cu-Al-Be single crystal and a macroscopic model for the reproduction of permanent effects in cyclic temperature-induced and stress-induced transitions. From the experimental point of view, the novelties are in the device that has been built and used for the test and in the full-field measurement technique at the basis of the data treatment. The especially designed gravity-based device allows for a uni-axial and uni-directional tensile test with slow loading rates. Simultaneously, the full-field measurement technique, known as grid method, provides high-resolution two-dimensional strain maps during all the transformation. With all the data collected during the test, we characterize for the first time the two-dimensional strain intermittency in a number of ways, showing heavy-tailed distributions for the strain avalanching over almost six decades of magnitude. In parallel, we develop a macroscopic mathematical model for the description of fatigue and permanent effects in several kinds of martensitic transformations. We show an easy way to calibrate the model parameters in the simple one-dimensional case. Moreover, we compare the numerical results with experimental data for different tests and specimens and obtain a good qualitative agreement

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Ma, Xiao. "Topological modelling of martensitic transformations in crystalline materials." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.440851.

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Della, Porta Francesco M. G. "Selection mechanisms for microstructures and reversible martensitic transformations." Thesis, University of Oxford, 2018. http://ora.ox.ac.uk/objects/uuid:085f0e90-6d07-4cb6-9bb9-13517de1b65e.

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The work in this thesis is inspired by the fabrication of Zn₄₅Au₃₀Cu₂₅. This is the first alloy undergoing ultra-reversible martensitic transformations and closely satisfying the cofactor conditions, particular conditions of geometric compatibility between phases, which were conjectured to influence reversibility. With the aim of better understanding reversibility, in this thesis we study the martensitic microstructures arising during thermal cycling in Zn₄₅Au₃₀Cu₂₅, which are complex and different in every phase transformation cycle. Our study is developed in the context of continuum mechanics and nonlinear elasticity, and we use tools from nonlinear analysis. The first aim of this thesis is to advance our understanding of conditions of geometric compatibility between phases. To this end, first, we further investigate cofactor conditions and introduce a physically-based metric to measure how closely these are satisfied in real materials. Secondly, we introduce further conditions of compatibility and show that these are nearly satisfied by some twins in Zn₄₅Au₃₀Cu₂₅. These might influence reversibility as they improve compatibility between high and low temperature phases. Martensitic phase transitions in Zn₄₅Au₃₀Cu₂₅ are a complex phenomenon, especially because the crystalline structure of the material changes from a cubic to a monoclinic symmetry, and hence the energy of the system has twelve wells. There exist infinitely many energy-minimising microstructures, limiting our understanding of the phenomenon as well as our ability to predict it. Therefore, the second aim of this thesis is to find criteria to select physically-relevant energy minimisers. We introduce two criteria or selection mechanisms. The first involves a moving mask approximation, which allows one to describe some experimental observations on the dynamics, while the second is based on using vanishing interface energy. The moving mask approximation reflects the idea of a moving curtain covering and uncovering microstructures during the phase transition, as appears to be the case for Zn₄₅Au₃₀Cu₂₅, and many other materials during thermally induced transformations. We show that the moving mask approximation can be framed in the context of a model for the dynamics of nonlinear elastic bodies. We prove that every macroscopic deformation gradient satisfying the moving mask approximation must be of the form 1 + a(x) ⊗ n(x), for a.e. x. With regards to vanishing interface energy, we consider a one-dimensional energy functional with three wells, which simplifies the physically relevant model for martensitic transformations, but at the same time highlights some key issues. Our energy functional admits infinitely many minimising gradient Young measures, representing energy-minimising microstructures. In order to select the physically relevant ones, we show that minimisers of a regularised energy, where the second derivatives are penalised, generate a unique minimising gradient Young measure as the perturbation vanishes. The results developed in this thesis are motivated by the study of Zn₄₅Au₃₀Cu₂₅, but their relevance is not limited to this material. The results on the cofactor conditions developed here can help for the understanding of new alloys undergoing ultra-reversible transformations, and as a guideline for the fabrication of future materials. Furthermore, the selection mechanisms studied in this work can be useful in selecting physically relevant microstructures not only in Zn₄₅Au₃₀Cu₂₅, but also in other materials undergoing martensitic transformations, and other phenomena where pattern formation is observed.

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Dean, Christopher. "Crystallography of transformation mechanisms in inorganic compounds /." Title page, contents and abstract only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phd281.pdf.

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Yeddu, Hemantha Kumar. "Martensitic Transformations in Steels : A 3D Phase-field Study." Doctoral thesis, KTH, Metallografi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-95316.

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Martensite is considered to be the backbone of the high strength of many commercial steels. Martensite is formed by a rapid diffusionless phase transformation, which has been the subject of extensive research studies for more than a century. Despite such extensive studies, martensitic transformation is still considered to be intriguing due to its complex nature. Phase-field method, a computational technique used to simulate phase transformations, could be an aid in understanding the transformation. Moreover, due to the growing interest in the field of “Integrated computational materials engineering (ICME)”, the possibilities to couple the phase-field method with other computational techniques need to be explored. In the present work a three dimensional elastoplastic phase-field model, based on the works of Khachaturyan et al. and Yamanaka et al., is developed to study the athermal and the stress-assisted martensitic transformations occurring in single crystal and polycrystalline steels. The material parameters corresponding to the carbon steels and stainless steels are considered as input data for the simulations. The input data for the simulations is acquired from computational as well as from experimental works. Thus an attempt is made to create a multi-length scale model by coupling the ab-initio method, phase-field method, CALPHAD method, as well as experimental works. The model is used to simulate the microstructure evolution as well as to study various physical concepts associated with the martensitic transformation. The simulation results depict several experimentally observed aspects associated with the martensitic transformation, such as twinned microstructure and autocatalysis. The results indicate that plastic deformation and autocatalysis play a significant role in the martensitic microstructure evolution. The results indicate that the phase-field simulations can be used as tools to study some of the physical concepts associated with martensitic transformation, e.g. embryo potency, driving forces, plastic deformation as well as some aspects of crystallography. The results obtained are in agreement with the experimental results. The effect of stress-states on the stress-assisted martensitic microstructure evolution is studied by performing different simulations under different loading conditions. The results indicate that the microstructure is significantly affected by the loading conditions. The simulations are also used to study several important aspects, such as TRIP effect and Magee effect. The model is also used to predict some of the practically important parameters such as Ms temperature as well as the volume fraction of martensite formed. The results also indicate that it is feasible to build physically based multi-length scale model to study the martensitic transformation. Finally, it is concluded that the phase-field method can be used as a qualitative aid in understanding the complex, yet intriguing, martensitic transformations.
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Zhang, Jimming. "A first principles study of the phase stabilities in Ti-transition-metal compounds and the shape memory effect in TiNi." Thesis, University of Southampton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242707.

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Rubini, Silvia. "Martensitic transformations in shape memory alloys by nuclear magnetic resonance /." [S.l.] : [s.n.], 1992. http://library.epfl.ch/theses/?display=detail&nr=1095.

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Muehlemann, Anton. "Variational models in martensitic phase transformations with applications to steels." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:bb7f4ff4-0911-4dad-bb23-ada904839d73.

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This thesis concerns the mathematical modelling of phase transformations with a special emphasis on martensitic phase transformations and their application to the modelling of steels. In Chapter 1, we develop a framework that determines the optimal transformation strain between any two Bravais lattices and use it to give a rigorous proof of a conjecture by E.C. Bain in 1924 on the optimality of the so-called Bain strain. In Chapter 2, we review the Ball-James model and related concepts. We present some simplification of existing results. In Chapter 3, we pose a conjecture for the explicit form of the quasiconvex hull of the three tetragonal wells, known as the three-well problem. We present a new approach to finding inner and outer bounds. In Chapter 4, we focus on highly compatible, so called self-accommodating, martensitic structures and present new results on their fine properties such as estimates on their minimum complexity and bounds on the relative proportion of each martensitic variant in them. In Chapter 5, we investigate the contrary situation when self-accommodating microstructures do not exist. We determine, whether in this situation, it is still energetically favourable to nucleate martensite within austenite. By constructing different types of inclusions, we find that the optimal shape of an inclusion is flat and thin which is in agreement with experimental observation. In Chapter 6, we introduce a mechanism that identifies transformation strains with orientation relationships. This mechanism allows us to develop a simpler, strain-based approach to phase transformation models in steels. One novelty of this approach is the derivation of an explicit dependence of the orientation relationships on the ratio of tetragonality of the product phase. In Chapter 7, we establish a correspondence between common phenomenological models for steels and the Ball-James model. This correspondence is then used to develop a new theory for the (5 5 7) lath transformation in low-carbon steels. Compared to existing theories, this new approach requires a significantly smaller number of input parameters. Furthermore, it predicts a microstructure morphology which differs from what is conventionally believed.

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Focht, Eric M. "Transformation induced plasticity in ceramics." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-12232009-020415/.

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Books on the topic "Martensitic transformations"

1

1911-, Cohen Morris, Olson Gregory B, and Owen W. S, eds. Martensite: A tribute to Morris Cohen. [Materials Park, Ohio]: ASM International, 1992.

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Cheng, Liu. Phase transformations in iron-based interstitial martensites. Delft, Netherlands: Technische Universiteit Delft, 1990.

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Teng, Yung-jui. Martensitic transformation theory. Beijing: International Academic Publishers,1991., 1991.

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Kurdi︠u︡mov, G. V. Vybrani prat︠s︡i. Kyïv: Akademperiodyka, 2002.

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Lobodi︠u︡k, V. A. Martensitnye prevrashchenii︠a︡. Moskva: Fizmatlit, 2009.

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IUTAM Symposium on Mechanics of Martensitic Phase Transformation in Solids (2001 Hong Kong, China). IUTAM Symposium on Mechanics of Martensitic Phase Transformation in Solids: Proceedings of the IUTAM symposium held in Hong Kong, China, 11-15 June 2001. Dordrecht: Kluwer Academic Publishers, 2002.

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International, Conference on Martensitic Transformations (1986 Nara-shi Japan). International Conference on Martensitic Transformations (ICOMAT-86): August 26-30, 1986, Nara Bunka-Kaikan, Nara, Japan : collected abstracts. Sendai, Japan: Japan Institute of Metals, 1986.

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International Conference on Martensitic Transformations. (6th 1989 Sydney, Australia). Martensitic transformations: Proceedings of the 6th International Conference on Martensitic Transformations held in Sydney, Australia, 2-7 July, 1989 : ICOMAT 89. Aedermannsdorf, Switzerland: Trans Tech Publications, 1990.

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Jeleńkowski, Jerzy. Przemiana martenzytu w austenit w stopach Fe-(23-26) Ni-(2-3)ti-(Nb) z dodatkami aluminium lub molibdenu. Warszawa: Oficyna Wydawnicza Politechniki Warszawskiej, 1996.

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Manabu, Ueno, Noguchi Osamu, and United States. National Aeronautics and Space Administration., eds. Martensitic transformations and microstructures in sintered NiAl alloys. Washington, DC: National Aeronautics and Space Administration, 1988.

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Book chapters on the topic "Martensitic transformations"

1

Porter, David A., Kenneth E. Easterling, and Mohamed Y. Sherif. "Diffusionless Martensitic Transformations." In Phase Transformations in Metals and Alloys, 375–502. 4th ed. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003011804-6.

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Roytburd, A. L., and J. Slutsker. "Martensitic Transformations in Constrained Films." In Solid Mechanics and Its Applications, 121–30. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-0069-6_15.

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Ericksen, J. L. "Weak Martensitic Transformations in Bravais Lattices." In Mechanics and Thermodynamics of Continua, 145–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-75975-8_8.

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Meng, Q. P., and N. Chen. "Interfacial Structural Modification of Martensitic Transformations." In Materials Science Forum, 2309–12. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-462-6.2309.

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Šilhavý, Miroslav. "On the Hysteresis in Martensitic Transformations." In Rational Continua, Classical and New, 151–68. Milano: Springer Milan, 2003. http://dx.doi.org/10.1007/978-88-470-2231-7_12.

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Kastner, Oliver, and Graeme J. Ackland. "Martensitic Transformations in 2D Lennard-Jones Crystals." In ICOMAT, 399–405. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118803592.ch58.

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Finlayson, T. R., G. J. McIntyre, and K. C. Rule. "The Martensitic Transformation in Indium-Thallium Alloys." In Proceedings of the International Conference on Martensitic Transformations: Chicago, 291–97. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76968-4_45.

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Barsch, Gerhard R., and Avadh Saxena. "James Arthur Krumhansl: Nonlinear Physics of Martensitic Transformations." In ICOMAT, 55–60. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118803592.ch7.

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Clapp, P. C., C. S. Becquart, S. Charpenay, D. Kim, Y. Shao, Y. Zhao, and J. A. Rifkin. "Dynamics of Martensitic Transformations Examined in a Computer." In NATO ASI Series, 697–702. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2476-2_54.

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Bruhns, O. T., and C. Oberste-Brandenburg. "On the Description of Martensitic Phase Transformations Using Tensorial Transformation Kinetics." In Solid Mechanics and Its Applications, 197–204. Dordrecht: Springer Netherlands, 2002. http://dx.doi.org/10.1007/978-94-017-0069-6_24.

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Conference papers on the topic "Martensitic transformations"

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Kastner, Oliver, and Graeme J. Ackland. "Load-Induced Martensitic Transformations in Pseudo-Elastic Lennard-Jones Crystals." In ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2008. http://dx.doi.org/10.1115/smasis2008-413.

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We present molecular dynamics (MD) simulations of a load-induced martensitic phase transformation in pseudo-elastic Lennard-Jones crystals. The model material exhibits martensitic transformations between cubic and hexagonal lattice structures in 2D which represent austenite and martensite. Under axial loading two martensite variants are favoured out of four generic variants possible with this model. In nucleation-and-growth processes the formation of martensite domains are observed in MD simulations and the reverse process upon unloading. Two possible re-transformation mechanisms are identified, a reversible and a reconstructive type. Reversible re-transformations conserve the reference unit cells, while the reconstructive mechanism involves the generation of dislocation motions which destroy the reference unit cells by slip. Both types re-establish the square lattice. While the reversible type represents the predominant reverse transformation mechanism, the reconstructive type is of special importance because it produces lattice defects, and plastic deformation which change both the evolution of subsequent transformation cycles and the magnitude of the phase transformation load.

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"Martensitic Transformations of Carbon Polytypes." In Shape Memory Alloys 2018. Materials Research Forum LLC, 2018. http://dx.doi.org/10.21741/9781644900017-27.

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Guthikonda, Venkata Suresh, and Ryan S. Elliott. "Thermodynamic modeling of martensitic phase transformations." In SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, edited by Masayoshi Tomizuka. SPIE, 2010. http://dx.doi.org/10.1117/12.847640.

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"Diamond-Like Phase Transformations of Martensitic Type." In Shape Memory Alloys 2018. Materials Research Forum LLC, 2018. http://dx.doi.org/10.21741/9781644900017-29.

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"Martensitic Structural Transformations of Fluorographene Polymorphic Varieties." In Shape Memory Alloys 2018. Materials Research Forum LLC, 2018. http://dx.doi.org/10.21741/9781644900017-28.

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Hornbogen, E. "Fractal Dimensions of Martensitic Microstructures." In ESOMAT 1989 - Ist European Symposium on Martensitic Transformations in Science and Technology. Les Ulis, France: EDP Sciences, 1989. http://dx.doi.org/10.1051/esomat/198902008.

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Cryderman, Robert, Dalton Garrett, and Zachary Schlittenhart. "Effects of Rapid Induction Heating on Transformations in 0.6% C Steels." In HT2019. ASM International, 2019. http://dx.doi.org/10.31399/asm.cp.ht2019p0106.

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Abstract Rapid induction hardening of martensitic steel can attain the very high strength levels needed for light-weighting components subjected to high operating stresses. Specimens of martensitic 0.6% C steels were heat treated using a dilatometer to investigate the effects of heating rates of 5 to 500 °C/s to temperatures of 850 to 1050 °C on the transformation to austenite and subsequent transformation to martensite during quenching. Selected specimens were quenched after partial transformation to austenite to assess the initial cementite precipitate size formed in ferrite during heating. Other specimens were isothermally held at the austenitizing temperature to assess cementite dissolution rates. Higher heating rates increased the Ac1 and Ac3 temperatures, and lowered the Ms temperature. Alloy content and prior microstructure also influenced the transformation temperatures.

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Plummer, Gabriel, Mikhail I. Mendelev, and John W. Lawson. "Molecular Dynamics Simulations of Microstructural Effects on Austenite-Martensite Interfaces in NiTi." In SMST 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.smst2024p0078.

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Abstract The formation and migration of austenite-martensite interfaces plays a key role in the reversible martensitic transformations of shape memory alloys (SMAs). How these interfaces interact with the SMA microstructure is a primary determining factor in important functional properties such as hysteresis and transformation span. Therefore, successful microstructural engineering of SMAs requires in-depth knowledge of interface behavior. The rapid nature of martensitic transformations makes experimental observations of moving interfaces challenging. Molecular dynamics (MD) simulation is a unique tool which can probe the atomic-scale details of austenite-martensite interfaces as they migrate and interact with different microstructural features. While MD simulations allow access to atomic-scale mechanisms, they are limited in time scale, typically to nanoseconds. This limitation creates problems when focusing on the entire transformation process in SMAs, specifically nucleation of new phases. To trigger nucleation on the nanosecond time scale, MD simulations must be performed so far from equilibrium that their relevance to experiment becomes questionable. Here, we demonstrate new MD simulation techniques to generate energetically preferred austenite-martensite interfaces in NiTi under near-equilibrium conditions. We then take advantage of this approach to probe interface behavior under conditions relevant to experiments. Our results demonstrate how austenite-martensite interfaces behave with dramatic differences in single crystals compared to more realistic microstructures containing features such as grain boundaries and precipitates. We identify trends in interface behavior which can be utilized to inform microstructural engineering approaches for SMAs.

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Chen, M. W., M. L. Glynn, D. Pan, K. T. Ramesh, K. J. Hemker, R. T. Ott, and T. C. Hufnagel. "Influence of Martensitic Transformation on the Durability of TBC Systems (Invited)." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-43203.

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Microstructural evolution of bond coat with thermal cycling was characterized with transmission electron microscopy (TEM) and high temperature X-ray diffraction (HT-XRD) analysis. Before thermal cycling, the structure of asfabricated bond coat was confirmed to be a long-range ordered B2 β-phase. After thermal cycling to ∼28% of the cyclic life, the bond coat was found to transform into a Nirich L10 martensite (M) from its original B2 structure. The transformations, M ↔ B2, were demonstrated to be reversible and to occur on heating and cooling in each cycle. Quantitative high temperature XRD measurements verified the phase transformations produce about 0.7 % transformation strain. Finite element calculations incorporating the transformation strain indicate that the mertensitic transformation significantly influences the development of stresses and strains in TBC systems.

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Escobar, J. C. "Stress-wave-induced martensitic phase transformations in NiTi." In Shock compression of condensed matter. AIP, 2000. http://dx.doi.org/10.1063/1.1303470.

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Reports on the topic "Martensitic transformations"

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Xu, Ping. Computer simulation of martensitic transformations. Office of Scientific and Technical Information (OSTI), November 1993. http://dx.doi.org/10.2172/10114699.

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Wayman, C. M. Martensitic Transformations in Iron Alloys. Fort Belvoir, VA: Defense Technical Information Center, November 1991. http://dx.doi.org/10.21236/ada626267.

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Sayir, A. Multifunctional Structural Ceramics with Ferroelastic and Martensitic Transformations. Fort Belvoir, VA: Defense Technical Information Center, August 2004. http://dx.doi.org/10.21236/ada450941.

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Vaidyanathan, R., M. A. M. Bourke, and D. C. Dunand. Stress-induced martensitic transformations in NiTi and NiTi-TiC composites investigated by neutron diffraction. Office of Scientific and Technical Information (OSTI), December 1998. http://dx.doi.org/10.2172/334213.

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Meyers, M., and G. Ravichandran. Martensitic transformation induced by stress pulses. Office of Scientific and Technical Information (OSTI), March 1990. http://dx.doi.org/10.2172/6956035.

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Lopez, P. C., J. R. Cost, and K. M. Axler. Martensitic nature of {delta} {yields} {gamma} allotropic transformation in plutonium. Office of Scientific and Technical Information (OSTI), September 1996. http://dx.doi.org/10.2172/378831.

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Ohba, Takuya, S. M. Shapiro, Shingo Aoki, and Kazuhiro Otsuka. Precursor phenomenon of martensitic transformation in Au-49.5at%Cd alloy. Office of Scientific and Technical Information (OSTI), December 1994. http://dx.doi.org/10.2172/10121178.

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Schwartz, A., M. Wall, J. Tobin, and M. Hochstrasser. Changes in the Electronic Structure Related to the Ni2MnGa Martensitic Phase Transformation. Office of Scientific and Technical Information (OSTI), October 2003. http://dx.doi.org/10.2172/15013777.

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