Characterization of mechanical properties of aluminum cast alloy at elevated temperature  

作　　者：Shuiqiang ZHANG Yichi ZHANG Ming CHEN Yanjun WANG Quan CUI Rong WU D.AROLA Dongsheng ZHANG 

机构地区：[1]Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University [2]Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University [3]University of Michigan-Shanghai Jiao Tong University Joint Institute,Shanghai Jiao Tong University [4]Motor Technical Center, Shanghai Automotive Industry Corporation [5]Department of Materials Science and Engineering, University of Washington [6]Department of Mechanics, College of Sciences, Shanghai University

出　　处：《Applied Mathematics and Mechanics(English Edition)》2018年第7期967-980,共14页应用数学和力学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.11372173,11672347,and 11727804);the Science and Technology Development Foundation of Shanghai Automobile Industry(No.1514)

摘　　要：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 real-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 at 100 ℃. As expected, the resistance to and changes from 200 ℃ to 300 ℃. coefficient and exponent reach maximum values creep decreases with the increasing temperatureThe 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 real-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 at 100 ℃. As expected, the resistance to and changes from 200 ℃ to 300 ℃. coefficient and exponent reach maximum values creep decreases with the increasing temperature

关 键 词：mechanical behavior aluminum（A1）cast alloy elevated temperature digital image correlation（DIC） optical extensometer 

分 类 号：O341[理学—固体力学]