基于微观参数的镍基单晶合金CMSX-4蠕变寿命预测  

Creep life prediction of nickel-based single crystal superalloy CMSX-4 based on microstructure parameter

作　　者：胡晓安 孙通 龙波 苗国磊 孙燕涛 张生良[4] HU Xiaoan;SUN Tong;LONG Bo;MIAO Guolei;SUN Yantao;ZHANG Shengliang(School of Aircraft Engineering,Nanchang Hangkong University,Nanchang 330063,Jiangxi,China;Jiangxi Key Laboratory of Micro Aero Engine(Nanchang Hangkong University),Nanchang 330063,Jiangxi,China;Chengdu Holy Industry and Commerce Corp.Ltd.,Chengdu 611936,Sichuan,China;Beijing Aeronautical Technology Research Centre,Beijing 100076,China)

机构地区：[1]南昌航空大学飞行器工程学院,江西南昌330063 [2]江西省微小航空发动机重点实验室,江西南昌330063 [3]成都航利(集团)实业有限公司,四川成都611936 [4]北京航空工程技术研究中心,北京100076

出　　处：《钢铁研究学报》2023年第1期79-87,共9页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(NSFC51905249)。

摘　　要：对变截面CMSX-4试样进行了不同温度下的蠕变试验,对比研究了不同应力处的微观组织筏化情况。结果表明:CMSX-4在温度和应力较低时筏化速率极慢,而在温度和应力较高时会快速完成筏化,在合适的温度和应力范围内γ相通道宽度会与材料损伤程度有显著的关联。基于相关结果,提出了一种以γ相通道宽度预测镍基单晶合金CMSX-4剩余蠕变寿命有效方法,通过对比本试验和其他相关报道的结果,本方法的预测结果分散性较小,均位于±1.5倍分散带内。Creep tests were conducted on CMSX-4 samples with variable cross-sections at different temperatures for a comparative study of the rafting of microstructures at different stresses. The results show that the rafting of CMSX-4 is extremely slow at low temperatures and stresses and is fast at high temperatures and stresses;the width of the γ-phase channel is significantly correlated to the degree of material damage within the appropriate temperature and stress range. Based on relevant results, an effective method for predicting the residual creep life of nickel-based single-crystal superalloy CMSX-4 from the width of the γ-phase channel is proposed. Compared with other relevant reports, the dispersity of the prediction results of this method is small and within ±1.5 times the dispersion band.

关 键 词：镍基单晶合金 CMSX-4 蠕变 微观结构 筏化 寿命预测 

分 类 号：TG146.1[一般工业技术—材料科学与工程] V252.2[金属学及工艺—金属材料]