摘要
为了研究金属箔的塑性变形性能与尺寸的相关性,在常温下对不同厚度和晶粒尺寸的黄铜箔试样进行了单向拉伸实验.结果表明:随着厚度或晶粒尺寸的减小,箔的屈服强度都会升高,晶粒尺寸对屈服强度的影响满足Hall-Petch细晶强化关系,厚度减小使屈服强度升高也可以主要归结于晶粒尺寸的减小.此外,当箔的厚度小于100μm时,厚度/晶粒尺寸比不能表征屈服强度的尺寸效应.
In order to investigate the size dependence of the plastic deformation properties for metal foil, uniaxial tensile tests of brass foil specimens with different thicknesses and grain sizes are performed at room temperature. The results show that the yield strength of the specimen increases with decreasing thickness or grain size. The influence of the grain size on the yield strength meets the Hall-Petch relation of the grain size strengthening. The increase in the yield strength of the thinner specimen can be also attributed to the decrease of grain size. In addition, the ratio of thickness to average grain size can not express the size effect of the yield strength if the thickness is less than 100 μm.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第4期419-422,共4页
Acta Metallurgica Sinica
基金
国家高技术研究发展计划项目2006AA04Z316
黑龙江省杰出青年科学基金项目JC-05-11资助~~
关键词
黄铜箔
微拉伸
屈服强度
尺寸效应
厚度/晶粒尺寸比
brass foil, micro-tensile, yield strength, size effect, ratio of thickness to grain size
