β-锡单晶的变形行为

从β-锡单晶晶体结构各向异性着手,研究总结了其变形行为:①拉伸性能及温度的影响;②蠕变性能与蠕变机制;③在一定载荷下,β-锡单晶的位错运动和滑移系开动情况。与和体心、面心立方金属相比,具有体心四方结构的β-锡单晶基本性能的研究还不完善;对于β-锡单晶的研究不仅有助于对β-锡多晶力学行为的机理性认识、细观尺度的力学模拟,而且对工业界新系列无铅焊料的开发有一定指导意义。

Review of Deformation Behavior in Beta-tin Crysta

Deformation behavior of beta-tin crystal is reviewed to provide a critical assessment of the current understanding of the subject. The review covers three main parts： （1） tensile properties, including the effect of temperature; （2） creep behavior with emphasis on the dominant creep mechanism; （3） dislocation structure and slip systems. The understanding of physical properties ofβ-tin with the single crystal structure of h.c.p is not sufficiently compared with the metal with crystal structure of f.c.c and b.c.c. The investigation on single crystalβ-tin not only helps us to discover the fundamental mechanical behavior, and meso-scale mechanics simulation of polycrystallineβ-tin, but also can provide significance guidelines for the industry development of new series of lead-free solder.