期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 856, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.158180
关键词
7075 aluminum alloy; W-temper; Digital image correlation; Portevin-Le Chatelier effect; Formability; Finite element modeling
资金
- Korea Institute of Advancement of Technology (KIAT) [N0002598]
- National Research Foundation (NRF) of Korea [2019R1A5A6099595, 2020R1A2B5B01097417]
- KIAT [0002019]
- National Research Foundation of Korea [2020R1A2B5B01097417] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The effect of W-temper heat treatment on the mechanical properties and fracture of high strength aluminum alloy 7075 sheet was studied experimentally and numerically. Different cooling conditions were considered, and the mechanical properties were measured along with the analysis of strain and strain rate distributions using DIC technique. The simulation of LDH formability test shows good agreement with experiments when the PLC effect and planar anisotropy are properly implemented.
The effect of W-temper heat treatment, consisting of solution heat treatment (SHT) and rapid cooling, on the mechanical properties and fracture of high strength aluminum alloy 7075 sheet is investigated experimentally and numerically. Three different cooling conditions from the solution heat treated as-received T6 temper 7075 alloy sheet are considered: water quenching, die quenching, and air cooling. The mechanical properties are measured by uniaxial tensile tests and limiting dome height (LDH) formability tests on the heat treated samples. Moreover, the distributions of strain and strain rate are analyzed by the full-field digital image correlation (DIC) technique, which enables the quantitative investigation on the Portevin-Le Chatelier (PLC) band propagations induced by dynamic strain aging (DSA). The DIC analysis reveals the distinctive formability between uniaxial and biaxial tensile stress states of the W-temper samples. In the finite element analysis, the hardening model based on Kocks-Mecking-Estrin-McCormick (KMEC) model is employed to incorporate the DSA-originated PLC band propagation in the simulation of LDH formability test. The simulated LDHs agree well with experiments when the PLC effect along with planar anisotropy of the heat treated 7075 alloy sheets is properly implemented. (C) 2020 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据