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Characterization of mechanical properties of aluminum cast alloy at elevated temperature

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The tensile response,the low cycle fatigue (LCF) resistance,and the creep behavior of an aluminum (A1) cast alloy are studied at ambient and elevated temperatures.A non-contact reai-time optical extensometer based on the digital image correlation (DIC) is developed to achieve strain measurements without damage to the specimen.The optical extensometer is validated and used to monitor dynamic strains during the mechanical experiments.Results show that Young's modulus of the cast alloy decreases with the increasing temperature,and the percentage elongation to fracture at 100 ℃ is the lowest over the temperature range evaluated from 25℃to 300℃.In the LCF test,the fatigue strength coefficient decreases,whereas the fatigue strength exponent increases with the rising temperature.The fatigue ductility coefficient and exponent reach maximum values at 100 ℃.As expected,the resistance to creep decreases with the increasing temperatureand changes from 200℃ to 300℃.

mechanical behavioraluminum (Al) cast alloyelevated temperaturedigital image correlation (DIC)optical extensometer

Shuiqiang ZHANG、Yichi ZHANG、Ming CHEN、Yanjun WANG、Quan CUI、Rong WU、D.AROLA、Dongsheng ZHANG

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Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University,Shanghai 200072, China

Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University,Shanghai 200072, China

University of Michigan-Shanghai Jiao Tong University Joint Institute,Shanghai Jiao Tong University, Shanghai 200240, China

Motor Technical Center, Shanghai Automotive Industry Corporation, Shanghai 201804, China

Department of Materials Science and Engineering, University of Washington,Seattle, WA 98195, U.S.A.

Department of Mechanics, College of Sciences, Shanghai University, Shanghai 200444, China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScience and Technology Development Foundation of Shanghai Automobile Industry

1137217311672347117278041514

2018

应用数学和力学(英文版)
上海大学

应用数学和力学(英文版)

CSCDEI
影响因子：0.294
ISSN：0253-4827
年,卷(期)：2018.39(7)
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