文档介绍：Trans. Nonferrous Met. Soc. China 24(2014) 632640Creep mechanism and creep constitutive model of aluminum silicateshort-fiber-reinforced magnesium positeJun TIAN, Zi-qiong SHISchool of Mechanical Engineering, Dongguan University of Technology, Dongguan 523808, ChinaReceived 7 February 2013; accepted 3 July 2013Abstract: By the constant stress tensile creep test method, creep tests were performed on aluminum silicate short fiber-reinforcedAZ91D magnesium posite with volume fraction of 30% and its matrix alloy AZ91D under different temperatures andstresses. The results indicate that posite and the matrix have the same true stress exponent and true activation energy forcreep, which are 3 and kJ/mol, respectively. The creep of posite is controlled by the creep of its matrix, which ismainly the controlling of viscous slip of dislocation, and the controlling of grain boundary slippage as a supplement. The creepconstitutive model obtained from the experiment data can well describe the creep deformation pattern of words: magnesium posites; threshold stress; effective stress; constitutive model1 IntroductionThe great importance placed on light materials bythe automobile, aerospace, and electronic industriesnecessarily introduces magnesium alloy as a promisingcandidate for extensive use in these fields [14]. AZ91 isthe monly used magnesium alloy due to itsgood property