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本文研究了大晶粒铝锰β—黄铜材料的应变速率、变形温度及原始组织对超塑性拉伸时总延伸率的影响规律;确定了材料的m值,并计算了超塑性变形时的激活能。金属超塑性的研究工作通常沿袭着微细晶粒超塑性的方向进行。这种超塑性现象需要材料具有细小的晶粒(一般为0.5～5微米),这就需要设计特殊成份的合金,或将材料进行复杂的预处理。然而近年来已证明,微细晶粒并不是金属材料表现出超塑性的必要条件,某些大晶粒材料也具有超塑性。本文将专就大晶粒β—黄铜的超塑性进行探讨。
In this paper, the effects of strain rate, deformation temperature and total elongation on the elongation of superplasticity of the raw material were studied. The m value of the material was determined and the influence of superplastic deformation Activate energy. Metal superplasticity research work is usually followed by the direction of fine grain superplasticity. This superplasticity requires that the material have fine grains (typically 0.5 to 5 microns) that require the design of alloys with special ingredients or the complex pretreatment of the material. However, it has been proved in recent years that fine grained grains are not a necessary condition for the superplasticity of the metal material. Some of the large grained materials also have superplasticity. This article will focus on the large grain β-brass superplasticity are discussed.