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一、引言众所周知,金属材料产生超塑性一般都要求符合以下条件:材料具有等轴细晶组织;变形温度必须在0.4～0.7绝对熔化温度之间;在10~(-6)至10~(-3)秒~(-1)的应变速率范围内变形;应力对应变速率敏感性指数 m 应大于0.3,最好超过0.5。Ti679合金超塑性研究一文,仅研究了α相粒度为2.02微米的等轴超细晶组织对
I. INTRODUCTION It is well known that the superplasticity of metal materials generally requires the following conditions: the material has an equiaxed fine grain structure; the deformation temperature must be between 0.4 and 0.7 absolute melting temperature; in the range of 10 -6 to 10 - 3) seconds ~ (-1) strain rate range of deformation; stress strain rate sensitivity index m should be greater than 0.3, preferably more than 0.5. Ti679 alloy superplasticity article, only the α-phase particle size of 2.02 microns isometric superfine grain pairs