铸造2012，Vol.61Issue(3)：300-303,4.
热处理对Al-Si-Cu-Mg铸造铝合金低周疲劳行为的影响
Influence of Heat Treatment on Low-Cycle Fatigue Behavior of Al-Si-Cu-Mg Alloy
李锋 1陈巧 1车欣 1陈立佳1
作者信息
- 1. 沈阳工业大学材料科学与工程学院,辽宁沈阳110870
- 折叠
摘要
Abstract
In order to determine the influence of solid-solution and solid-solution plus aging treatments on low-cycle fatigue behavior of permanent-mold cast Al-Si-Cu-Mg alloy, the strain controlled low-cycle fatigue tests were performed at room temperature and different total strain amplitudes. The experimental results show that the permanent-mold cast Al-Si-Cu-Mg alloy exhibits the cyclic strain hardening, softening and stability. The solid-solution and solid-solution plus aging treatments can effectively enhance the fatigue lives of the permanent-mold cast Al-Si-Cu-Mg alloy, and the solid-solution treatment has more significant in enhancing the fatigue lives of the alloy. A single-slope linear relationship between plastic and elastic strain amplitudes as well as reversals to failure is observed for both as-cast and solid-solution treated Al-Si-Cu-Mg alloys. For the permanent-mold cast Al-Si-Cu-Mg alloy subjected to solid-solution plus aging treatment, the relationship between elastic strain amplitude and reversals to failure also shows linear behavior, but a bilinear relationship between plastic strain amplitude and reversals to failure is noted. Moreover, the relationship between cyclic stress amplitude and plastic strain amplitude exhibits linear behavior.关键词
铝合金/热处理/低周疲劳/疲劳寿命/循环应力响应Key words
aluminium alloy/heat treatment/low-cycle fatigue/fatigue life/cyclic stress response分类
矿业与冶金引用本文复制引用
李锋,陈巧,车欣,陈立佳..热处理对Al-Si-Cu-Mg铸造铝合金低周疲劳行为的影响[J].铸造,2012,61(3):300-303,4.
