Relevant bibliographies by topics / Cryogenic rolling

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Academic literature on the topic 'Cryogenic rolling'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Cryogenic rolling"

1

Meyer, D., E. Brinksmeier, and F. Hoffmann. "Surface hardening by cryogenic deep rolling." Procedia Engineering 19 (2011): 258–63. http://dx.doi.org/10.1016/j.proeng.2011.11.109.

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2

Wang, Peng Fei, Chen Bin Liu, Jin Chuan Jie, and Ting Ju Li. "An Effective Method to Fabricate 5083 Aluminum Alloy with Excellent Corrosion Resistance." Materials Science Forum 898 (June 2017): 1300–1304. http://dx.doi.org/10.4028/www.scientific.net/msf.898.1300.

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The 5083 aluminum alloy was prepared and subjected to cryogenic rolling (CR) after heat treatment. The samples were reduced from 15mm to 1.5 mm in the thickness direction and the amount of deformation was 90%. For comparison, samples with the same deformation amount were obtained by room temperature rolling (RTR). The corrosion behavior of CR and RTR samples was measured by electrochemical test, and their microstructures before and after corrosion had been studied through electron scanning microscopy (SEM) and optical microscope (OM). The influence of cryogenic rolling on the corrosion behavior of 5083 aluminum alloys was explored. The experiment results suggested that anti-corrosion ability of 5083 aluminum alloys could be enhanced through cryogenic rolling. The corrosion potential elevated and the corrosion current density reduced according to the electrochemical test. The primary reasons and corresponding mechanism were also discussed.
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3

Petrousek, Patrik, Tibor Kvackaj, Róbert Kocisko, et al. "INFLUENCE OF CRYOROLLING ON PROPERTIES OF L-PBF 316L STAINLESS STEEL TESTED AT 298K AND 77K." Acta Metallurgica Slovaca 25, no. 4 (2019): 283. http://dx.doi.org/10.12776/ams.v25i4.1366.

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<p class="AMSmaintext">The goal of the present work is to evaluate mechanical properties and to analyse the microstructure of 316L stainless steel produced by Laser Powder Bed Fusion (L-PBF) follow by rolling with different thickness reduction under ambient and cryogenic conditions. The samples before rolling were heat treated. The static tensile test was realized at ambient and cryogenic (77K) conditions. The L-PBF powder metal production technology approved that is a key technology in the AM area, especially for metal powder materials. Mechanical properties tested at 298K and 77K shows that the application of various thermo-deformation rolling conditions increases of strength properties. Achieved mechanical properties are comparable to conventional bulk materials. The strength properties after the rolling under ambient and cryogenic conditions were significantly increased.<strong></strong></p>
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4

Oevermann, Torben, Thomas Wegener, and Thomas Niendorf. "On the Evolution of Residual Stresses, Microstructure and Cyclic Performance of High-Manganese Austenitic TWIP-Steel after Deep Rolling." Metals 9, no. 8 (2019): 825. http://dx.doi.org/10.3390/met9080825.

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The mechanical properties and the near surface microstructure of the high-manganese twinning-induced plasticity (TWIP) steel X40MnCrAl19-2 have been investigated after deep rolling at high (200 °C), room and cryogenic temperature using different deep rolling forces. Uniaxial tensile tests reveal an increase in yield strength from 400 to 550 due to surface treatment. The fatigue behavior of selected conditions was analyzed and correlated to the prevailing microstructure leading to an increased number of cycles to failure after deep rolling. Deep rolling itself leads to high compressive residual stresses with a stress maximum of about 800 in the subsurface volume characterized by the highest Hertzian pressure and increased hardness up to a distance to the surface of approximately 1 mm with a maximum hardness of 475 0.1. Due to more pronounced plastic deformation, maximum compressive residual stresses are obtained upon high-temperature deep rolling. In contrast, lowest compressive residual stresses prevail after cryogenic deep rolling. Electron backscatter diffraction (EBSD) measurements reveal the development of twins in the near surface area independently of the deep rolling temperature, indicating that the temperature of the high-temperature deep rolling process was too low to prevent twinning. Furthermore, deep rolling at cryogenic temperature leads to a solid–solid phase transformation promoting martensite. This leads to inferior fatigue behavior especially at higher loads caused by premature crack initiation. At relatively low loads, all tested conditions show marginal differences in terms of number of cycles to failure.
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5

Shi, Jin Tao, Long Gang Hou, Cun Qiang Ma, et al. "Mechanical Properties and Microstructures of 5052 Al Alloy Processed by Asymmetric Cryorolling." Materials Science Forum 850 (March 2016): 823–28. http://dx.doi.org/10.4028/www.scientific.net/msf.850.823.

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Aluminum alloy sheets were asymmetrically rolled at room and cryogenic temperatures by imposing different velocity ratios of 1~1.5 between the upper and bottom rolls. After rolling, the stress-strain curves, microhardness as well as the microstructures of the rolled samples were characterized and analyzed. The experimental results showed that the asymmetric cryorolling could improve the grain refinement and offered (~12%) higher room temperature tensile strength than that processed by symmetrical rolling with velocity ration of 1.0 (~280 MPa). However, at cryogenic temperature, the strength of asymmetrically cryorolling sheet (with velocity ratio of 1.5) was 5.1%, which is less than that processed by symmetrical rolling.
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6

Kvačkaj, Tibor, Robert Kočiško, Robert Bidulský, et al. "The Influence of Thermo-Plastic Processes on Materials Recovery." Materials Science Forum 782 (April 2014): 379–83. http://dx.doi.org/10.4028/www.scientific.net/msf.782.379.

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The influence of thermo-plastic processes through methods of severe plastic deformations (SPD) and rolling carried out at ambient and cryogenic temperatures on recovery of two materials was investigated. The aim of this study was to insert strains to materials having middle and high stacking fault energy (SFE) in ambient and cryogenic temperature conditions, respectively and subsequently, through DSC method, to observe an influence of the storage energy on structural recovery of materials. As experimental materials were used oxygen free high conductivity copper (OFHC Cu) and C-Si steel which represent materials with middle and high stacking fault energy (SFE), respectively. The OFHC Cu was subjected to equal channel angular rolling (ECAR) by seven passes. ECAR is a method belonging to a SPD group. It was shown, five ECAR passes have a significant effect on material properties. The rolling performed at cryogenic temperatures using a laboratory duo rolling mill was carried out only once. This study implies that a recovery process (characterized by the mobility of structural defects) starts as follows: for OFHC Cu without ECAR and processed by 5thECAR passes: 0.31·Tmeltand 0.19·Tmelt, respectively, for C-Si steel processed by cryorolling: 0.095·Tmelt.
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7

Šimčák, Dušan, Tibor Kvačkaj, Róbert Kočiško, Róbert Bidulský, Ján Kepič, and Viktor Puchý. "EVALUATION OF HIGHT PURITY ALUMINIUM AFTER ASYMMETRIC ROLLING AT AMBIENT AND CRYOGENIC TEMPERATURES." Acta Metallurgica Slovaca 23, no. 2 (2017): 99. http://dx.doi.org/10.12776/ams.v23i2.928.

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<p class="AMSmaintitle"><span lang="EN-US">Ultrafine grained materials are capable of superplastic elongation at strain rates faster than those currently employed for commercial superplastic forming operations. However, such operations require the material in the form of thin sheets. Asymmetric rolling (ASR), as one of severe plastic deformation (SPD) methods, was used to make ultra-fined grain materials with enhanced performance. This work show effect of the deformation paths on micro-hardness and mechanical properties changing during asymmetric rolling of pure aluminium. In our case, the asymmetric condition was introduced by using different diameters with a ratio of upper and bottom roll 2,4. The thickness of samples was reduced about 20% - 40% at ambient temperature and at cryogenic temperature. Asymmetric rolling at cryogenic temperature (ASR-C) provides greater strength tensile properties than rolling at ambient temperature (ASR-A). </span></p>
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8

Xiu-Yan, Feng, Cheng Zhi-Ying, Zhou Jia, Wu Xiao-Lei, Wang Zi-Qiang, and Hong You-Shi. "Deformation Twinning in Nanocrystalline Ni during Cryogenic Rolling." Chinese Physics Letters 23, no. 2 (2006): 420–22. http://dx.doi.org/10.1088/0256-307x/23/2/040.

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9

Konkova, T., S. Mironov, A. Korznikov, and S. L. Semiatin. "Microstructural response of pure copper to cryogenic rolling." Acta Materialia 58, no. 16 (2010): 5262–73. http://dx.doi.org/10.1016/j.actamat.2010.05.056.

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10

Kočiško, Róbert, Tibor Kvačkaj, Andrea Kováčová, et al. "The mechanical properties of OFHC copper and CuCrZr alloys after asymmetric rolling at ambient and cryogenic temperatures." Open Engineering 8, no. 1 (2018): 426–31. http://dx.doi.org/10.1515/eng-2018-0041.

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Abstract This work deals with comparing the mechanical properties of OFHC copper and CuCrZr alloys processed by asymmetric ambient rolling (ASaR) and asymmetric cryorolling (AScR). The conditions for asymmetrical rolling were ensured by different diameters of the main rolls. The thickness of samples was reduced about 20% - 70% at ambient temperature and at a temperature of liquid nitrogen. Mechanical properties such as yield strength, tensile strength, reduction of area and microhardness were determined for all rolled samples. Rolling at cryogenic temperatures provide about 50-60MPa more tensile strength for Cu and 60-80 MPa for CuCrZr alloys when rolling at ambient temperature. After AScR of CuCrZr alloys, a start of precipitation was shifted at the temperature of 434∘C and recrystallization was a part of the precipitation peak. According to the results, plastic deformation through shear bands is the dominant mechanism in materials with lower stacking fault energy (CuCrZr) treated under cryogenic conditions.
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