A two-material miniature specimen test method and the associated inverse approach for high temperature applications

被引:12
作者
Wen, W. [1 ]
Sun, W. [1 ]
Becker, A. A. [1 ]
机构
[1] Univ Nottingham, Fac Engn, Univ Pk, Nottingham NG7 2RD, England
基金
英国工程与自然科学研究理事会;
关键词
Miniature specimen; Two-material; Creep damage; Creep fracture; Finite element; Inverse method; ELASTIC-PLASTIC PROPERTIES; TENSILE PROPERTIES; CREEP-PROPERTIES; LIFE ASSESSMENT; BEHAVIOR;
D O I
10.1016/j.tafmec.2018.10.008
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
A miniature two-material testing method has been developed for material property characterization. Elastic-plastic and creep damage models have been applied for a semi-analytical model and a finite element (FE) model to simulate the miniature specimen tensile and creep tests on a two-material system. An inverse optimization algorithm has been developed to extract the creep properties of the unknown material in the two-material system from the experimental results. Single-material miniature specimen tensile tests have been performed for an aluminum alloy at room temperature and 400 degrees C and full stage creep tests have been performed for a P91 steel at 650 degrees C. The miniature specimen testing results are comparable to the results from the corresponding conventional uniaxial tensile and creep tests on the same materials and under the same test conditions. This miniature specimen testing technique and the developed inverse method have the potential to become a new approach for determining the elastic-plastic and the full-stage creep properties until rupture for a two-material system at high temperature, e.g. a coating-substrate system.
引用
收藏
页码:1 / 8
页数:8
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