518 不連続強化型金属基複合材料の熱サイクル超塑性に関する微視力学的研究

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This paper deals with an anomalous creep deformation, termed internal stress superplasticity which is observed in metal matrix composites under thermal cycling conditions over a wide range of external loads. We especially take notice of the behavior in a high stress range in tension. The constitutive relation is developed to analyze this superplaasticity behavior due to internal stresses caused by the difference in thermal expansions and plastic deformation abilities of matrix and inclusion phases on a basis of a micromechanical approach. This method of analysis takes into account the microscale-level stress relaxation by interfacial diffusion between these two phases. To verify the validity of this analysis, we perform experiments with Al-Al_3Ni composites in detail.
一般社団法人日本機械学会の論文
2003-09-23