摘要
测量材料微区残余应力的大小和分布,对于研究微观断裂机制具有非常重要的意义,一直是研究的热点和难点。尝试利用常规的维氏显微硬度压痕法研究和测量了材料中微米级微区的残余应力,推导出了残余应力与压痕面积比之间的理论公式,并选取低碳钢、紫铜和铝合金等三种具有不同性能的薄板材料,利用“三点弯曲”人为“原位”引入应力,通过试验测量对该方法进行了验证,并与原有的理论和方法进行了对比。结果表明:该测量方法测量准确。
The measurement of the value and distribution for micro-residual stress in materials was crucial and difficult for micro-fracture theory. A regular Vickers micro-indentation for evaluating the micro-residual stress in micron-range was introduced. Three common metals including mild steel, copper and aluminum alloy were used in the experiment, and residual stresses were induced ＂in-situ＂ by using three-point bending. The results show that the present measurement is accurate.
出处
《机械工程材料》
CAS
CSCD
北大核心
2007年第1期8-11,共4页
Materials For Mechanical Engineering
基金
石油科技中青年创新基金资助项目(2002CX05)
全国博士学位论文作者专项资金资助项目(FANEDD)(200233)
关键词
残余应力
显微硬度
压痕
弯曲
residual stress
micro-hardness
indentation
bending
