摘要
研究了时效处理、固溶+时效处理对挤压变形Mg-7%Zn-0.6%Zr镁合金低周疲劳性能的影响。结果表明,不同制度的热处理有效地提高挤压变形Mg-7%Zn-0.6%Zr镁合金在较低外加总应变幅下的循环应力幅;热处理提高挤压变形镁合金在较高外加总应变幅下的疲劳寿命,但降低合金在较低外加总应变幅下的疲劳寿命;不同处理状态的挤压变形Mg-7%Zn-0.6%Zr镁合金的塑性应变幅、弹性应变幅与疲劳断裂时的载荷反向周次之间的关系可分别用Coffin-Manson和Basquin公式来描述。此外,不同处理状态的挤压变形Mg-7%Zn-0.6%Zr镁合金的循环应力幅与塑性应变幅之间呈线性关系。
Influence of solid solution and solution plus aging treatments on low-cycle fatigue properties of extruded Mg-7% Zn-0. 6% Zr magnesium alloy was investigated. The results show that the cyclic stress amplitudes of the extruded Mg-7% Zn-0.6% Zr alloy at lower total strain amplitudes increase after the different heat treatments. Heat treatment can increase the fatigue lives of the extruded Mg-7% Zn- 0.6% Zr alloy at higher total strain amplitudes, but decreases those at lower total strain amplitudes. For the extruded Mg-7% Zn-0. 6% Zr alloy with different treated states, the relationship of plastic strain amplitude and elastic strain amplitude with reversals to failure can be described by Coffin-Manson and Basquin equations, respectively, and a linear relationship is observed between cyclic stress amplitude and plastic strain amplitude.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第11期17-20,共4页
Transactions of Materials and Heat Treatment
基金
辽宁省高等学校优秀人才支持计划(LR201030)
关键词
镁合金
热挤压
热处理
低周疲劳
疲劳寿命
magnesium a l.loy
hot-extrusion
heat treatment
low-cycle fatigue
fatigue life
