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Journal articles on the topic 'Aging condition'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Yang, Heng, Ge Ning Xu, and Rong Rong Zuo. "Research of System Aging Fuzzy Reliability Based on Discrete-Time Condition." Advanced Materials Research 230-232 (May 2011): 461–65. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.461.

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In face of the problem of difficulty in traditional aging fuzzy reliability solving, a deep research is conducted on the aging fuzzy reliability calculation method of components and systems based on discrete-time condition. On the basis of aging fuzzy reliability calculation, the concept of time axis division and fuzzy theory operating rules are introduced. The degree of reliability calculation method of aging fuzzy reliability of individual component and system under the condition of discrete-time is also deduced, and avoid the integral solving problems when the ageing fuzzy reliability of co

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2

Younis Abdullah, Zainab, and Suha Fadhil Dulaimi. "The Effect of Aging on Surface Hardness of Provisional Crown and Bridge Material." Tikrit Journal for Dental Sciences 9, no. 2 (2023): 129–36. http://dx.doi.org/10.25130/tjds.9.2.9.

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Background: Mechanical characteristics are necessary for temporary treatments. that enable them to hold use within the oral cavity. Surface hardness is an accurate indication of wear and deterioration resistance. Aim: To evaluat e and compare the surface Hardness of 2 types of composite material (Harvard- temp and Charm- temp). The specimens were tested in dry conditions and after 2 week of aging in artificial saliva. Material and Methods: Whole of 32 specimens of dimensions 64mm×10mm×2.5mm divided in two groups according the type of material (Harvard- temp or Charm- temp). Each group of mater

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3

Wang, Feng, Bai Qing Xiong, Yon Gan Zhang, et al. "Microstructure and Mechanical Properties of the Spray-Deposited Al-10.8Zn-2.8Mg-1.9Cu Alloy at Various Aging Conditions." Materials Science Forum 561-565 (October 2007): 809–12. http://dx.doi.org/10.4028/www.scientific.net/msf.561-565.809.

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In this paper, Al-10.8Zn-2.8Mg-1.9Cu alloy was synthesized by the spray atomization and deposition technique. The microstructure and mechanical properties of the spray deposited alloy at various aging conditions (T6, T73 and RRA treatment) were studied using high-resolution electron microscopy, selected area diffraction, and tensile tests. The results indicate that the two types of GP zones, GPI and GPII zones are major precipitates for the alloy under peak-aged condition. The peak UTS and YS values achieved at an ageing temperature of 120 °C was 818 MPa and 793 MPa. Under two-step aging condi

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4

Thonusin, Chanisa, Siriporn C. Chattipakorn, and Nipon Chattipakorn. "Staying fit and the obese aging heart condition." Aging 13, no. 10 (2021): 13374–75. http://dx.doi.org/10.18632/aging.203070.

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Zhang, Jin, Yan Ling Tao, and Zhi Fu Sun. "Microstructure of AZ91D in Different Treatment Conditions." Materials Science Forum 546-549 (May 2007): 143–46. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.143.

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The microstructures of magnesium alloy AZ91D in as-cast, solid solution and aging conditions were studied by optical, scanning electron and transmission electronic microscopes. The relationship between microstructure and the microhardness was analyzed. It has been found that the microhardness in the matrix varied slightly with the increasing solution time, but increased quickly with the aging time. The difference of the microhardness between the matrix and the second phase in as-cast condition is larger than that in T6 aging condition, because the aluminum-zinc-magnesium (poor) phase existed i

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6

Khanal, Kashi Nath. "Disability in Aging People: Functioning Difficulties and Infrastructural Barriers." Journal of Development Review 8, no. 1 (2023): 124–31. http://dx.doi.org/10.3126/jdr.v8i1.57120.

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Disability is the physical, mental and psychological condition that prevents an individual to perform common type of day-to-day activities, and creates significant barrier in social participation. It includes health loss, status loss, and social loss. Disability snatches individual’s functioning capacities. Structural barriers restrict people with disabilities from full and effective participation in society. Disability is not a personal problem; it is shaped by the larger socio-cultural, geo-political and economic context of a nation. Also, there are perfect parallels between disability and a

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7

Geng, Jiu Guang, Qian Wang, and Wei Guang Li. "Aging Behavior of SBS Modified Asphalt in Coupled Water – Heat Condition." Advanced Materials Research 723 (August 2013): 575–79. http://dx.doi.org/10.4028/www.scientific.net/amr.723.575.

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The aging simulating tests of the SBS and SBS modified asphalt under the conditions of wet and dry are compared and the effect of water on the aging of modified asphalt was investigated by infrared spectroscopy analysis. The results showed that: after aging in the wet conditions the change range of asphalt performance increased. Infrared spectroscopy analysis results showed that the carbonyl content of asphalt and SBS after the aging in wet conditions increased. It was proved that the presence of water accelerated the aging of asphalt and SBS under the action of heat and oxygen. This is mainly

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8

Gu, Hening, Yongqiang Zhu, Yunchu Zhu, Lijing Chu, Qinyuan Peng, and Qian Chen. "Rheological Properties and Microscopic Characterization of Delayed Decay-Modified Asphalt Based on UV Ageing." Advances in Materials Science and Engineering 2023 (February 6, 2023): 1–11. http://dx.doi.org/10.1155/2023/9655742.

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For clarifying the applying feasibility of hindered amine light stabilizers in asphalt binder, two types of hindered amine light stabilizers were chosen as a UV ageing resistance modifier and the modified asphalt was prepared with a selected UV ageing resistance modifier. The ultraviolet aging testing method of asphalt materials was proposed for UV ageing behavior characterization. Under the condition of different frequencies, the impact of UV ageing resistance modifier on asphalt was investigated through using the frequency sweep test of DSR. Under the effect of ultraviolet aging, the variati

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9

Wang, S. Q., Jin He Liu, and Dao Lun Chen. "Influence of Heat Treatment on Fatigue Resistance of Electron Beam Welded Dissimilar Titanium Alloy Joints." Advanced Materials Research 891-892 (March 2014): 1539–44. http://dx.doi.org/10.4028/www.scientific.net/amr.891-892.1539.

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The purpose of this study was to evaluate the influence of heat treatment on the microstructural change and low cycle fatigue (LCF) resistance of an electron beam welded (EBWed) dissimilar joint between Ti-6Al-4V and Ti17 alloys. The aging with solution (STA) had a more significant effect on the microstructure and hardness than aging, compared to the as-welded joint. The post-welded joints in both aging and STA conditions were basically cyclic stable at low strain amplitudes up to 0.6%, while cyclic softening occurred at higher strain amplitudes. The fatigue life in the aging condition was sli

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10

Yi, Chun Fang, Yi Xin Chen, and Pei Song Liang. "Study on the Composite Insulator Material’s Characteristics under Artificial Corona Aging Condition." Advanced Materials Research 986-987 (July 2014): 106–9. http://dx.doi.org/10.4028/www.scientific.net/amr.986-987.106.

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The HTV SIR provided the superior hydrophobicity for the composite insulator. But it faces the aging problem more than the inorganics. Corona, as an inevitable influence factor in insulator’s operation, its effect to the material could not be ignored. The paper developed a multi needles to plate corona aging equipment, 1000 hours’ corona aging to the HTV SIR was done. The duration of corona aging effect was study by FTIR, SEM and volume resistivity-temperature character testing. Three testing methods from the aspect of material’s chemical, physical and electrical characters to evaluate the agi

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11

McCann, Heather, Briony Durand, and Claire E. Shepherd. "Aging-Related Tau Astrogliopathy in Aging and Neurodegeneration." Brain Sciences 11, no. 7 (2021): 927. http://dx.doi.org/10.3390/brainsci11070927.

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Astrocytes are of vital importance to neuronal function and the health of the central nervous system (CNS), and astrocytic dysfunction as a primary or secondary event may predispose to neurodegeneration. Until recently, the main astrocytic tauopathies were the frontotemporal lobar degeneration with tau (FTLD-tau) group of disorders; however, aging-related tau astrogliopathy (ARTAG) has now been defined. This condition is a self-describing neuropathology mainly found in individuals over 60 years of age. Astrocytic tau accumulates with a thorny or granular/fuzzy morphology and is commonly found

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12

Rew, Jehyeok, Young-Hwan Choi, Hyungjoon Kim, and Eenjun Hwang. "Skin Aging Estimation Scheme Based on Lifestyle and Dermoscopy Image Analysis." Applied Sciences 9, no. 6 (2019): 1228. http://dx.doi.org/10.3390/app9061228.

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Besides genetic characteristics, people also undergo a process of skin aging under the influence of diverse factors such as sun exposure, food intake, sleeping patterns, and drinking habits, which are closely related to their personal lifestyle. So far, many studies have been conducted to analyze skin conditions quantitatively. However, to describe the current skin condition or predict future skin aging effectively, we need to understand the correlation between skin aging and lifestyle. In this study, we first demonstrate how to trace people’s skin condition accurately using scale-invariant fe

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13

Zettel-Watson, L. A., J. Tessler, J. Kircher, et al. "ACCELERATED PHYSICAL AND COGNITIVE AGING IN A CHRONIC PAIN CONDITION VS. NORMAL AGING." Innovation in Aging 1, suppl_1 (2017): 144–45. http://dx.doi.org/10.1093/geroni/igx004.577.

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14

Li, Zhuo Qun, Da Yong Shan, Wei Ke, and En Hou Han. "Effect of Aging on Electrochemical Behavior of T6-Treated WE54 Mg Alloy." Materials Science Forum 546-549 (May 2007): 533–36. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.533.

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Microstructural examinations of T6-treated WE54 magnesium alloy were conducted after different aging conditions, and the influence of aging on electrochemical behavior of this alloy was investigated. For three batches of samples, with increasing aging time, the amount of precipitate phases was greatly promoted, and they formed in a strengthening continuous way. Electrochemical study showed that the value of corrosion potential followed the tendency to decrease when the aging condition transformed from under-aged to peak-aged. However, after peak-aging, the corrosion potential was raised to hig

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15

Wallace, Gloriajean L. "My Gray is Golden: Thoughts About Aging From the Perspective of Adults With Neurologically Based Communication Impairments." Perspectives on Gerontology 19, no. 1 (2014): 24–35. http://dx.doi.org/10.1044/gero19.1.24.

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Aging with disability may follow several trajectories, depending on the nature of the disability, the age of onset, the individual differences in the person, and the support systems available. This article will discuss theories of aging and loss together with various neurological diagnoses, where the two conditions (aging and neurological condition) lead to individual differences in coping, compensation, and outcome.

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16

Zhang, Yan Nian, and Jun Xie. "Compressive Behaviour of Laminated Neoprene Bridge Bearing Pads under Thermal Aging Condition." Materials Science Forum 972 (October 2019): 118–22. http://dx.doi.org/10.4028/www.scientific.net/msf.972.118.

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The present study was conducted to obtain a better understanding of the variation rule of mechanical properties of laminated neoprene bridge bearing pads under thermal aging condition using compression tests. A total of 5 specimens were processed in a high-temperature chamber. After that, the specimens were tested subjected to axial load. The parameter mainly considered time of thermal aging processing for specimens. The results of compression tests show that the specimens after thermal aging processing are more probably brittle failure than the standard specimen. Moreover, the exposure of ste

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17

Lee, Seung-Won, Ik-Su Kwon, Byung-Bae Park, et al. "Calculation of Aging Coefficient for Establishing Aging Condition Index of Thermoplastic Insulated Power Cables." Applied Sciences 15, no. 14 (2025): 8106. https://doi.org/10.3390/app15148106.

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The growing demand for direct current transmission emphasizes the need for advanced insulation suitable for high-capacity, long-distance applications. Thermoplastics, especially polypropylene, offer several advantages over conventional materials like XLPE (cross-linked polyethylene) and EPR (ethylene propylene rubber), including higher thermal stability, recyclability, and reduced space charge accumulation. However, due to the inherent rigidity and limited flexibility of PP, its mechanical aging becomes a critical factor in assessing its long-term reliability as a cable insulation. In this stu

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18

Fu, Xiaotao, Long Ma, Lincong Chen, et al. "Study on Blending Modification of Bisphenol A Epoxy." Polymers 15, no. 15 (2023): 3263. http://dx.doi.org/10.3390/polym15153263.

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Epoxy-resin-based composites in the field of current electrical materials often work in high temperature, high humidity or salt spray conditions. In order to improve the operation reliability of the composite insulator cross arm in a high temperature, high humidity and high salt spray environment, and analyze the aging mechanism and performance characteristics of resin, in this paper, wet heat aging and salt spray aging experiments were carried out on the blended resin system composed of bisphenol A type epoxy resin (E-51), aliphatic epoxy modified bisphenol A epoxy resin (2021P/E-51) and dime

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19

Ahagon, Asahiro, M. Kida, and H. Kaidou. "Aging of Tire Parts during Service. I. Types of Aging in Heavy-Duty Tires." Rubber Chemistry and Technology 63, no. 5 (1990): 683–97. http://dx.doi.org/10.5254/1.3538282.

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Abstract Three types of aging were found to exist. The factors determining the types were the temperature and the air-supply conditions irrespective of where the rubber was aged, in the tires or in the laboratory. This means that the aging characteristics of a tire part in the field can be properly predicted if these factors in a tire are taken into account in the laboratory evaluation. In the first type, Type I, the aging yields increased M100 and reduced λb closely following the reference relation, Equation (3), which holds for the rubbers crosslinked with increasing the amount of curatives.

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20

Alshehawy, Abdelrahman M., Diaa-Eldin A. Mansour, Mohsen Ghali, Matti Lehtonen, and Mohamed M. F. Darwish. "Photoluminescence Spectroscopy Measurements for Effective Condition Assessment of Transformer Insulating Oil." Processes 9, no. 5 (2021): 732. http://dx.doi.org/10.3390/pr9050732.

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Condition assessment of insulating oil is crucial for the reliable long-term operation of power equipment, especially power transformers. Under thermal aging, critical degradation in oil properties, including chemical, physical, and dielectric properties, occurs due to the generation of aging byproducts. Ultraviolet-visible (UV-Vis) spectroscopy was recently proposed for the condition assessment of mineral oil. However, this absorption technique may involve all electronic states of the investigated material which typically yield a broad spectrum, and thus cannot precisely reflect the electroni

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21

Matsumoto, Katsushi, Yasuhiro Aruga, Hidemasa Tsuneishi, Hikaru Iwai, Masataka Mizuno, and Hideki Araki. "Effects of Zn Addition and Aging Condition on Serrated Flow in Al-Mg Alloys." Materials Science Forum 794-796 (June 2014): 483–88. http://dx.doi.org/10.4028/www.scientific.net/msf.794-796.483.

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The serrated flow phenomena in Al-Mg alloys with and without Zn were investigated after aging on several conditions, focusing on the role of precipitates. Al-6mass%Mg-0~3mass%Zn alloys were solution treated at 753~803K, quenched, and then aged at room temperature. Further artificial aging at 323~573K for 86.4ks was performed for some of them after natural aging for 2.6Ms. The serrated flow behavior was evaluated by tensile test. Microstructure was characterized by differential scanning calorimetry, transmission electron microscopy, atom probe tomography, and positron annihilation lifetime spec

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22

Benedetta Bartali. "Poor Nutrition with Aging: an "Oxidatively Stressing" Condition." Current Nutrition & Food Science 3, no. 3 (2007): 216–21. http://dx.doi.org/10.2174/157340107781369170.

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23

Li, Karen Z. H., Lynn Hasher, Deborah Jonas, Tamara A. Rahhal, and Cynthia P. May. "Distractibility, circadian arousal, and aging: A boundary condition?" Psychology and Aging 13, no. 4 (1998): 574–83. http://dx.doi.org/10.1037/0882-7974.13.4.574.

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24

Zamanzadeh, Mehrooz, Clinton Char, George T. Bayer, Peyman Taheri, and Anil Kumar Chikkam. "Condition Assessment of Aging Concrete Structures—part 2." CoatingsPro 25, no. 2 (2025): 66–70. https://doi.org/10.5006/cp2025_25_2-66.

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This two-part article is a review of the corrosion risk assessment, structural considerations, and engineering solutions for the steel-reinforced structural elements within an aging concrete building that exhibits accelerated corrosion in corrosive environments. Additionally, it examines factors that could potentially result in the progressive failure and eventual collapse of an aging building. Part 1 addressed the fundamentals of structural analysis, rebar corrosion, carbonation, and the role of chlorides. Part 2 addresses inspection and condition assessment procedures and recommendations, en

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Zamanzadeh, Mehrooz, Clinton Char, George T. Bayer, Peyman Taheri, and Anil Kumar Chikkam. "Condition Assessment of Aging Concrete Structures—Part 1." CoatingsPro 25, no. 1 (2025): 48–51. https://doi.org/10.5006/cp2025_25_1-48.

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This two-part article is a review of the corrosion risk assessment, structural considerations, and engineering solutions for the steel reinforced structural elements within an aging concrete building that exhibited accelerated corrosion in corrosive environments, along with factors that could potentially result in the progressive failure and eventual collapse of an aging building. Part 1 addresses the fundamentals of structural analysis, rebar corrosion, carbonation, and the role of chlorides. Part 2 will address inspection and condition assessment procedures and recommendations; engineering s

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Zamanzadeh, Mehrooz, Clinton Char, George T. Bayer, Peyman Taheri, and Anil Kumar Chikkam. "Condition Assessment of Aging Concrete Structures–Part 1." Materials Performance 63, no. 3 (2024): 40–43. https://doi.org/10.5006/mp2024_63_3-40.

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This two-part article is a review of the corrosion risk assessment, structural considerations, and engineering solutions for the steel reinforced structural elements within an aging concrete building that exhibited accelerated corrosion in corrosive environments, along with factors that could potentially result in the progressive failure and eventual collapse of an aging building. Part 1 addresses the fundamentals of structural analysis, rebar corrosion, carbonation, and the role of chlorides. Part 2 will address inspection and condition assessment procedures and recommendations; engineering s

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27

Zamanzadeh, Mehrooz, Clinton Char, George T. Bayer, Peyman Taheri, and Anil Kumar Chikkam. "Condition Assessment of Aging Concrete Structures–Part 2." Materials Performance 63, no. 11 (2024): 22–26. https://doi.org/10.5006/mp2024_63_11-22.

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This two-part article is a review of the corrosion risk assessment, structural considerations, and engineering solutions for the steel-reinforced structural elements within an aging concrete building that exhibits accelerated corrosion in corrosive environments. Additionally, it examines factors that could potentially result in the progressive failure and eventual collapse of an aging building. Part 1 addressed the fundamentals of structural analysis, rebar corrosion, carbonation, and the role of chlorides. Part 2 addresses inspection and condition assessment procedures and recommendations, en

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28

Mansjur, Zuldesmi, and Hendro Maxwel Sumual. "Enhancement of Mechanical Properties of Cast Beta-Type Titanium Alloy by Aging Treatment." Materials Science Forum 929 (August 2018): 42–49. http://dx.doi.org/10.4028/www.scientific.net/msf.929.42.

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Beta type Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) is one of the titanium alloys which have gained much attention in dental applications. Dental precision casting is predominant for fabricating dental prostheses. However, there is a possibility for the mechanical properties of its casting to be degraded because of a α case, shrinkages and pores and a dendrite structure. One of the ways to enhance their mechanical properties is heat treatment process. Therefore, the aim of this study is to investigate the effect of aging treatment on mechanical properties and microstructure of TNTZ cast into magnesia ba

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Bang, Jinhyeok, Yongjoon Kang, Namkyu Kim, et al. "Effect of Aging Heat Treatment Conditions on the Mechanical Properties and Microstructure of Base and Weld Metal of Alloy 282 Superalloy." Korean Journal of Metals and Materials 58, no. 8 (2020): 540–49. http://dx.doi.org/10.3365/kjmm.2020.58.8.540.

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The effect of aging heat treatment conditions on the mechanical properties and microstructure of the base and weld metal of Alloy 282 superalloy was investigated. The aging heat treatment conditions employed in this study were as follows: two-steps (1010 °C for 2 hours plus 788 °C for 8 hours) and one-step at 788 °C, 738 °C, and 688 °C for 4 hours. The base metal with the one-step aged condition exhibited lower hardness but longer creep life than that treated with the two-step aged condition. The base metal subjected to the two-step aging exhibited the highest hardness and the shortest creep l

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Li, Zhi Hui, Bai Qing Xiong, Yon Gan Zhang, et al. "Research on Multi-Artificial Aging Applied to Aluminum Alloy 7150 Plate." Materials Science Forum 706-709 (January 2012): 340–45. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.340.

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The AA 7150-T351, in the form of 40 mm thick plates, was subjected to single-stage aging leading to peak aged condition, and two selected multi-artificial aging treatments leading to the over aged conditions. The microstructural differences along the thickness direction of the AA 7150-T351 plate were investigated using OM and electron backscatter diffraction (EBSD) technique, and the microstructural characterization was studied at different stages of multi-artificial ageing process by transmission electron microscopy. Tensile properties and electrical conductivity measurements were used to eva

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31

NAKAYAMA, Yoshihiro, and Shigeki NAKANISHI. "Effects of pre-aging condition on two-step aging behavior of 6063 aluminum alloy." Journal of Japan Institute of Light Metals 55, no. 5 (2005): 199–203. http://dx.doi.org/10.2464/jilm.55.199.

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Seo, Dong Yi, Scott Bulmer, H. Saari, Han Liang Zhu, and Peter Au. "The Role of Interfacial Precipitates on Creep Behaviour of Power Metallurgy (PM) Ti-48Al-2Cr-2Nb+1W Alloy." Materials Science Forum 654-656 (June 2010): 496–99. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.496.

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Pre-alloyed powders with a nominal composition of Ti-48Al-2Cr-2Nb+1W were consolidated by hot isostatic pressing (HIP). After the HIP process, a step cooled heat treatment (SCHT) with a carefully controlled cooling rate was applied to homogenize the HIP’ed microstructure and produce a fully lamellar microstructure. Following the SCHT, various isothermal aging at 950 °C and step aging processes form interfacial precipitates at the lamellar interfaces. The morphology, size, and distribution of the precipitates are dependent on the aging condition. Creep tests were carried out in air at 760 °C an

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Lekdim, Atef, Laurent Morel, and Marie-Ange Raulet. "Magnetic properties evolution of a high permeability nanocrystalline FeCuNbSiB during thermal ageing." European Physical Journal Applied Physics 79, no. 2 (2017): 20601. http://dx.doi.org/10.1051/epjap/2017160449.

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It is found to be one of the major issues while designing an aircraft, mass and volume have to be reduced in order to achieve energy efficiency. This leads to a high compactness of the electrical components which enables them to withstand at high temperatures. The magnetic components which are responsible for the electrical energy conversion, therefore exposed to high temperatures in working conditions. Their thermal ageing becomes a serious problem and deserves a particular attention. The FeCuNbSiB nanocrystalline materials have been selected for this ageing study because they are used in pow

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Yamada, Hiroshi, Mitsuaki Furui, Susumu Ikeno, Yukio Sanpei, Katsuya Sakakibara, and Seiji Saikawa. "Microstructure and Aging Behavior in AM60 Magnesium Alloy Cast into Sand and Permanent Molds." Materials Science Forum 654-656 (June 2010): 679–82. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.679.

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AM60 magnesium alloy castings gave the solution treatment at 688K for 86.4ks. After that, aging treatment was carried out at three temperatures of 473, 498 and 523K. The age hardening curve obtained, hardness of all the specimens in the condition of peak aging was increased by decreasing the aging temperature. In the condition of long aging time, a cellular precipitation grows up from grain boundary to crystal grain. Fine cellular precipitation and intergranular precipitation obviously occurs at the lower aging temperature.

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35

Winter, Lisa, Kristin Hockauf, Mario Scholze, Ralph Jörg Hellmig, and Thomas Lampke. "Influence of Pre-Aging on the Artificial Aging Behavior of a 6056 Aluminum Alloy after Conventional Extrusion." Metals 11, no. 3 (2021): 385. http://dx.doi.org/10.3390/met11030385.

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In the present study, the influence of the initial heat-treatment conditions on the artificial aging behavior after conventional linear extrusion at room temperature was investigated for the precipitation hardening of a 6056 aluminum alloy. A solution-annealed condition was systematically compared to naturally-aged and pre-aged conditions. Differential scanning calorimetry was used for analyzing the precipitation sequence and its dependence on the initial heat treatment. The natural aging behavior prior to extrusion and the artificial aging behavior after extrusion were determined by microhard

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36

Zindal, Anuz, and Jayant Jain. "Influence of Aging Condition on the Characteristics of Continuous Precipitates of AZ80 Magnesium Alloy." Key Engineering Materials 982 (July 3, 2024): 21–26. http://dx.doi.org/10.4028/p-fp7ign.

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The aim of this work is to evaluate the characteristics of continuous precipitates (CP) developed within the grain and grain boundary precipitates through statistical analysis of the number density and size (i.e., length and width) at varying aging conditions of AZ80 Mg alloy. Scanning electron microscopy illustrates the characteristics and features of precipitates, distinctively. The results reveal an increment of number density, whereas the reduction in the size of precipitates with decrease in the aging temperature for the varying aging times. The variation in hardness values at different a

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Ziewiec, A., A. Zielińska-Lipiec, J. Kowalska, and K. Ziewiec. "Microstructure Characterization of Welds in X5CrNiCuNb16-4 Steel in Overaged Condition." Advances in Materials Science 19, no. 1 (2019): 57–69. http://dx.doi.org/10.2478/adms-2019-0005.

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AbstractThe paper presents the results of the investigation of microstructure of the welded X5CrNiCuNb16-4 (17-4PH) steel after solution treatment and aging at 620°C for different periods. The microstructure and the phase composition of the steel was investigated using light microscopy (LM), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), transmission electron microscopy (TEM) and the X-ray diffraction (XRD). Hardness was measured for samples aged at different times. Density distributions of Cu precipitates were established. The investigation has shown that the micros

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38

Mustafa, Ehtasham, Ramy S. A. Afia, Aamir Nawaz, Oumaima Nouini, and Zoltán Ádám Tamus. "Implementation of Non-Destructive Condition Monitoring Techniques on Low-Voltage Nuclear Cables: II. Thermal Aging of EPR/CSPE Cables." Energies 15, no. 9 (2022): 3231. http://dx.doi.org/10.3390/en15093231.

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Determining the aging state of low-voltage nuclear power plant cables using a nondestructive and reliable condition monitoring technique is highly desirable as the cables experience multiple aging stresses during the service period. This paper deals with the implementation and investigation of such nondestructive techniques, which can detect the overall aging state of low-voltage instrumentation and control (I&C) cables, which are subjected to accelerated thermal aging. The dielectric spectroscopy, extended voltage response, and polarization–depolarization current as nondestructive electri

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Lee, Insup. "Improvement of the Surface Properties of Low Temperature Plasma Nitrocarburized Martensitic Precipitation-Hardening Stainless Steel by Aging Treatment." Materials Science Forum 941 (December 2018): 1778–83. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1778.

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Various aging treatments were conducted on AISI 630 martensitic precipitation hardening stainless steel in order to optimize aging condition. Aging treatment was carried out with Ar gas in the chamber at temperature of 380°C, 400°C and 430°C and times of 2, 4 and 8 h. After obtaining the optimized aging condition, several nitrocarburizing treatments were done with and without the aging treatment. Nitrocarburizing was performed on the samples at 400V with a gas mixture of H2, N2 and CH4 for 15 hrs at 4.0 Torr vacuum pressure. The aging condition was optimized as 400°C temperature for 4 h. Bette

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Jena, Pradipta Kumar, K. Suresh, K. Sivakumar, R. K. Mandal, and A. K. Singh. "Effect of Aging on the Ballistic Performance of AA 7017 Alloy." Defence Science Journal 73, No 2 (2023): 182–92. http://dx.doi.org/10.14429/dsj.73.18639.

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 This study presents the effect of aging on microstructure, texture, mechanical and ballistic properties of AA-7017 aluminium alloy. AA-7017 alloy is subjected to three different aging namely under-aging, peak-aging and over-aging. Significant difference is observed in the mechanical properties after aging. The alloy exhibits maximum strength and hardness in the peak-aged condition. From texture measurements, it is noticed that the overall intensity of orientation distribution function increases from under-aged to peak-aged condition. The AA-7017 aged plates are impacted with 7.62 mm ste

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Mustafa, Ehtasham, Ramy S. A. Afia, and Zoltán Ádám Tamus. "Condition Monitoring Uncertainties and Thermal - Radiation Multistress Accelerated Aging Tests for Nuclear Power Plant Cables: A Review." Periodica Polytechnica Electrical Engineering and Computer Science 64, no. 1 (2019): 20–32. http://dx.doi.org/10.3311/ppee.14038.

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The low voltage cables in the nuclear power plant have the same importance as veins have in the human body. Since, the cables inside the containment are under a number of environmental stress, out which the thermal and radiation stresses are important and become more effective with the presence of oxygen. These stresses cause the degradation of the insulation and hence may lead to insulation failure. To study the behavior of the cables under the nuclear power plant environmental stress, the cables are subjected to accelerated aging tests in laboratories which helps in determining their withsta

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Liu, Jiefeng, Xianhao Fan, Yiyi Zhang, Hanbo Zheng, Zixiao Wang, and Xixi Zhao. "A Modified Aging Kinetics Model for Aging Condition Prediction of Transformer Polymer Insulation by Employing the Frequency Domain Spectroscopy." Polymers 11, no. 12 (2019): 2082. http://dx.doi.org/10.3390/polym11122082.

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The aging kinetics model is of great interest to scholars since it is capable of describing the variation law between the degree of polymerization (DP) and the aging duration of transformer polymer (cellulose) insulation. However, it is difficult to determine the moisture content inside the transformer polymer insulation without destroying it, so that the model parameters cannot be confirmed. Such limitation greatly restricts its application. It is interesting to note that as long as the moisture content of the transformer polymer insulation could be characterized (replaced) by a certain featu

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Abdul-Maleka, Zulkurnain, Amir Hesam Khavari, Nabipour Afrouzi Hadi, and Saeed Vahabi-Mashak. "Effect of Ambient Temperature Zinc Oxide Surge Arrester Condition Monitoring." Applied Mechanics and Materials 554 (June 2014): 573–77. http://dx.doi.org/10.4028/www.scientific.net/amm.554.573.

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Various methods have been developed to monitor surge arrester condition and predict the probable interruption which can be caused by the failure of surge arresters. This paper aims to carry out experimental and simulation work to find the relationship between the aging level, arrester surface temperature and ambient temperature. COMSOL simulation software was used for the modeling of 120kV rated gapless ZnO surge arresters. It is observed from both the simulation analysis and experimental data that the leakage current and temperature increase as a consequence of an increase in the applied volt

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Cristina-Pereira, Renata, Anna Luiza de Araújo Ribeiro, Anna Cláudia Ferreira Nunes, et al. "Study of the Relation between Aging and Pesticides: A Review." International Neuropsychiatric Disease Journal 21, no. 4 (2024): 26–46. http://dx.doi.org/10.9734/indj/2024/v21i4440.

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Aims: The main aim of this study was to use specific data from the literature on ageing, correlating this with the pesticide contamination, in order to understand the relationship with an increasingly ageing population. Study Design: A systematic review was performed. Place and Duration of Study: Laboratory of Biomathematics of the Federal University of Alfenas, Minas Gerais State, Brazil, between April 2023 and August 2023. Methodology: A systematic search of articles was performed using the CAPES Periodic platform, a searcher from the Education Ministry of Brazil that contains Web of Science

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Hussian, Abbasi. "Insulation Materials of Transformer Using Chemical Mechanism of Moisture Absorption." International Journal of Engineering Works 1, no. 1 (2014): 15–19. https://doi.org/10.5281/zenodo.15744.

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The composite insulation system of power transformers consisting of two insulation materials (cellulose and mineral oil) are the main insulation material of power transformer, the increase of moisture will reduce their insulation strength. Moisture equilibrium curves are the basis of power transformer moisture detection, however, the service data and theory analysis both indicate the present curves are not fit for old transformer. Therefore this research work is focused the law and mechanism of the impact of aging on moisture equilibrium of cellulose and mineral oil. In this paper theory of mo

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Agilan, M., T. Venkateswaran, D. Sivakumar, and Bhanu Pant. "Effect of Post Weld Heat Treatment on Mechanical Properties and Microstructure of Nickel Based Super Alloy Welds." Advanced Materials Research 585 (November 2012): 435–39. http://dx.doi.org/10.4028/www.scientific.net/amr.585.435.

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In the present paper, Haynes 214 plate of 7mm thick was welded by Gas tungsten arc welding (GTAW) in two passes. The welded plates were subjected to post-weld heat treatment such as direct aging (DA) and solution treatment + aging (STA). The aging cycle was optimized using hardness by generating isothermal aging curve. The weld tensile properties, hardness test, microscopic analysis and fractographic studies were carried out in as-welded condition and at two different post-weld heat treatment conditions. The results show a significant increase in both yield and tensile strength after post weld

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Orlova, S. V., E. V. Prokopenko, E. A. Nikitina, et al. "The role of natural antioxidants and enzyme inhibitors in the prevention of skin aging." Medical alphabet, no. 16 (September 4, 2024): 8–12. http://dx.doi.org/10.33667/2078-5631-2024-16-8-12.

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Aging is a progressive degenerative condition accompanied by an increasing loss of physiological integrity and function. Aging is an inevitable process that includes, among other things, an imbalance between antioxidant defenses and reactive oxygen species, changes in protein and mitochondrial turnover, telomere attrition, cellular senescence, epigenetic changes and stem cell depletion. These conditions are associated with mild to moderate inflammation, which always accompanies the aging process and age-related diseases. Skin aging is a very complex biological phenomenon controlled by many int

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Yang, Tian, Shijian Lu, Da Song, et al. "Effect of Nanofiller on the Mechanical Properties of Carbon Fiber/Epoxy Composites under Different Aging Conditions." Materials 14, no. 24 (2021): 7810. http://dx.doi.org/10.3390/ma14247810.

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In this study, carbon fiber-reinforced epoxy composites (CFRPs) containing multi-walled carbon nanotube (MWCNT) and halloysite nanoclay were fabricated. The effects of these nanofillers (MWCNT and nanoclay) on the tensile and flexural properties of the CFRPs under different aging conditions were studied. These aging conditions included water soaking, acid soaking, alkali soaking, and thermal shock cycling. The experimental results showed that, after accelerated aging, the mechanical performance of the CFRPs decreased. The performance degradation in the soaking environment depends on the immers

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Panmala, Nattapon, Thanapong Suwanasri, and Cattareeya Suwanasri. "Condition Assessment of Gas Insulated Switchgear Using Health Index and Conditional Factor Method." Energies 15, no. 24 (2022): 9393. http://dx.doi.org/10.3390/en15249393.

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This paper proposes a comprehensive procedure to assess the condition of gas insulated switchgear (GIS) equipment by using the conventional weight and score method and introducing a conditional factor to improve the accuracy of the health index evaluation. Generally, the inspection and testing of GIS components are conducted according to manufacturer recommendations and guidelines in the international standards. However, this raw data has not been simplified and systematically processed for condition assessment. The score and weight technique are applied to transform the physical condition acc

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Zhang, Hai Long, and Ling Quan. "Safe and Sustainable for the Structural Silicone Sealant in Ultra High-Rise Building Curtains." Applied Mechanics and Materials 238 (November 2012): 83–86. http://dx.doi.org/10.4028/www.scientific.net/amm.238.83.

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The properties of the structural silicone sealant under standard condition and after aging conditions were characterized. The results showed that the structural silicone sealant had very good ability to resist the ultraviolet in the long time. In the other aging environment conditions, the different failure time for the structural silicone sealant were appeared. The value of the maximum strength under the different mechanical aging factors obviously existed in the structural silicone sealant with different compositions. The residual strength that the attenuation ratio is more than 75% standard

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