摘要
针对经过常规热挤压的Al-0.8%Mg-O.6%Si一0.3%ASc合金进行不同道次和路径的等通道转角挤压,采用的等通道转角挤压工艺为1道次和2道次A路径、&路径和C路径。对等通道转角挤压制备的Al-0.8%Mg-0.6%Si-0.3%Sc合金进行应室温低周疲劳实验,研究了等通道挤压Al一0.8%Mg-0.6%Si-0.3%Sc合金的疲劳行为。结果表明,在低周疲劳加栽条件下,等通道转角挤压Al—Mg—Si—Sc合金可表现为持续循环硬化或初期循环硬化后期循环稳定。合金的弹性应变幅、塑性应变幅与断裂时的栽荷反向周次之间的关系可分别用Basquin和Coffin-Manson公式描述。
One pass and two passes of equal channel angle pressing ECAP with routes A, Bc and C were conducted for the conventionally hot--extruded A1--Mg--Si--Sc alloy. Through performing the total strain controlled fatigue experiments at room temperature, the fatigue behavior of the ECAPed A1--Mg--Si--Sc alloy was investigated. The experimental results show that, Under low--cycle fatigue loading condition, the ECAPed A1--Mg--Si--Sc alloys can exhibit the continuous cyclic strain hardening or initial cyclic strain hardening followed by cyclic stability. For the ECAPed A1--Mg--Si--Sc alloy, the re- lations between elastic strain amplitude, plastic strain amplitude and reversals to failure can be described by Basquin and Coffin -- Manson equations, respectively.
出处
《中国材料科技与设备》
2013年第1期41-43,共3页
Chinese Materials Science Technology & Equipment
关键词
铝合金
等通道转角挤压
循环应力响应
循环应力一应变行为
Aluminum alloy
Equal channel angle pressing
Cyclic stress response
Cyclic stress--strain behavior