【摘要】 对LY12CZ材料进行了压痕蠕变和单轴拉伸蠕变试验。通过有限元方法,对压痕蠕变试验进行了模拟。通过压痕蠕变试验结合有限元的方法,确定了材料的蠕变参数,其中应力指数n’mI=nI=4.894,蠕变常数c’mI=5.780×10-19s-1MPan。从以上的研究中发现,由单轴蠕变试验(nm和cm)和压痕蠕变试验结合有限元(n’mI和c’mI)分别得出的蠕变参数是一致的,而且最重要的是压痕蠕变指数与材料的蠕变指数是相等的,nm=nI。更多还原

【Abstract】 Indentation creep testing and uniaxial creep testing were carried out using aluminum alloy LY12CZ. The indentation creep testing was simulated by the finite element method. With the indentation creep testing results in conjunction with finite element creep analysis, the material creep parameters (n’mI = nI =4.894 and c’mI=5.780×10-19 s-1MPan) were derived. It is found that the creep parameters from the uniaxial tensile creep testing (nm and cm) and indentation creep testing in combination with finite element method (n’mI and c’mI) can meet each other. The indentation creep testing can been used to determine the creep parameters (nm and cm). The most important conclusion is that the indentation creep exponent is equal to the material creep exponent, nm = nI.更多还原