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各种工业多晶金属所共有的重要塑性变形项目是:(1)位错性滑移;(2)晶粒间界滑移。前者在份量上为最主要,它造成表面微观滑移台阶,从而积垒成滑移带的表面露头以及宏观应变痕等现象;后者在高温变形中突出地重要,它在金相记录中,也将一条直线切断而后滑开。这个研究的目的是以此二客观现象为主,作一个模型,从而计算工业多晶金属材料的力学行为。为要由这两个客观现象中抽出一个模型,考虚圆柱拉力试件表面上的一条柱线Lo——用这个向量代表,其长度L_0为材料实验中延伸仪所量之初长。当此初长被拉长到L>L_0时,原来的表面柱
A variety of industrial polycrystalline metal common plastic deformation of the project are: (1) dislocation slip; (2) grain boundary slip. The former is the most important component in terms of weight, which results in microscopic slip steps on the surface, and hence the phenomenon of surface outcrops and macroscopic strain marks in the slippery zone; the latter is outstandingly important in high temperature deformation. In metallographic records, Will also cut a straight line and then slide open. The purpose of this study is to use two objective phenomena as a model to calculate the mechanical behavior of industrial polycrystalline metallic materials. In order to extract a model from these two objective phenomena, a column Lo on the surface of a cylindrical tensile specimen is represented by this vector, and its length, L_0, is the initial length of the extensometer in the material experiment. When the initial length is elongated to L> L_0, the original surface pillars