摘要
在室温和拉伸速度1 mm·min^(-1)的条件下,对两种不同晶间偏析程度的CuSn10P1合金进行了单向拉伸试验。结果表明,半固态合金抗拉强度和断后伸长率相比液态合金分别提高30.7%和378.7%。在拉伸过程中,两种材料的裂纹都是沿晶间和α相高锡过渡层扩展,但是半固态CuSn10P1合金具有更优异的力学性能。这主要归因于半固态CuSn10P1合金具有较少的晶间组织、更细小的晶粒尺寸和更高的Sn元素固溶度。断裂后,在半固态CuSn10P1合金的α相高锡过渡层区域发现了变形孪晶,说明其变形机制由滑移机制向孪生机制转变。
Unidirectional tensile tests were carried out on CuSn10P1 alloys with two different intergranular segregation degrees at room temperature and stretching velocity of 1 mm·min^(-1).The results show that the tensile strength and elongation after fracture of semi-solid alloy are increased by 30.7%and 378.7%than those of liquid alloy,respectively.Cracks in both materials extend along the intergranular andα-phase high Sn transition layer during tension process,but the semi-solid CuSn10P1 alloy has superior mechanical properties.This is mainly attributed to that the semi-solid CuSn10P1 alloy has less intergranular structure,finer grain size and higher solid solubility of Sn element.After fracture,deformed twins are found in the region ofα-phase high Sn transition layer of the semi-solid CuSn10P1 alloy,indicating a shift in the deformation mechanism from slip mechanism to twinning mechanism.
作者
刘章兴
文科
李永坤
熊文韬
王志杰
周荣锋
LIU Zhang-xing;WEN Ke;LI Yong-kun;XIONG Wen-tao;WANG Zhi-jie;ZHOU Rong-feng(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650032,China;City College,Kunming University of Science and Technology,Kunming 650051,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2024年第8期171-178,共8页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(5176050239)。
关键词
CuSn10P1合金
晶间偏析
断裂行为
变形机制
CuSn10P1 alloy
intergranular segregation
fracture behavior
deformation mechanism
