期刊
MATERIALS & DESIGN
卷 37, 期 -, 页码 491-499出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2012.01.036
关键词
Non-ferrous and alloy; Plastic behavior; Non-destructive testing
资金
- Aeronautical Science Foundation of China [2011ZE53059]
In order to investigate the micromechanical behavior of forged 7050 aluminum alloy with different heat treatment conditions, microindentation experiments of 7050-T7451 and 7050-T7452 were performed with various maximum indentation loads and various loading speeds. A non-destructive instrumental approach was applied to indicate mechanical properties such as Young's modulus E, microhardness H, initial yield stress sigma(y) and strain hardening exponent n using the available experimental indentation P-h curves from the microindentation tests. The experimental results revealed that loading speed exerted little influence on measurement of E and H. E decreased rapidly because of the indentation damage accumulation, and H decreased with the increase of indentation load, which showed strong indentation size effects. Dimensionless functions Pi(1) and Pi(2) were used to describe the plasticity constitutive equations and revealed that the heat treatment conditions influenced the micromechanical properties. H and sigma(y) tested from the microindentation of 7050-T7451 were higher than those of 7050-T7452, and microindentation plasticity constitutive equations were obtained by using Hookean elastic and power-law plastic stress-strain relation equations, which were verified by finite element method (FEM) simulation well. (C) 2012 Elsevier Ltd. 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