Alternative TitlePhase Morphology Evolution of a Single Crystal Nickel-Base Superalloy in the 011 Direction During the Tensile Creep
水丽; 金涛; 田素贵; 胡壮麒
Source Publication稀有金属材料与工程
Abstract研究了980℃,200MPa拉伸蠕变期间011取向镍基单晶高温合金中γ’相的演化方式。采用有限元方法计算了单晶合金在有/无外加载荷时Von Mises应力及弹性应变能密度在γ和γ’两相中的分布。结果表明:沿011取向施加拉伸应力时,与应力轴呈45°角基体通道(roof)的Von Mises应力远高于与应力轴平行的基体通道(gable)中的Von Mises应力,两通道中应变能密度的差异驱动γ’相形成元素从变形较大的通道向变形较小的通道扩散,而γ相形成元素反向扩散,导致γ’相沿0101和100取向扩散生长,形成垂直于001方向且与应力轴倾斜成45°角的层片状筏形组织。
Other AbstractBy means of finite elements analysis, an investigation has been made for the directional coarsening manners and evolutional rule of γ' precipitates in a single crystal nickel-base superalloy with 011 orientation during tensile creep at 980℃ and 200 MPa. Results show that the von Mises stress in the matrix channel that is 45° with respect to the loading direction is larger than that in the matrix channel that is parallel to the loading direction when external loads applied along the 011 direction. The strain energy change in two kinds of matrix channel is the driving force for the γ' directional coarsening, the γ' phase developed along the 010 and 100 and perpendicular to the 001 orientations, and formed lamellar raft morphology inclined 45° angle to the tensile stress axis.
Keyword镍基单晶合金 有限元分析 组织演化 蠕变
Indexed ByCSCD
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Cited Times:3[CSCD]   [CSCD Record]
Document Type期刊论文
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GB/T 7714
水丽,金涛,田素贵,等. 011取向镍基单晶合金高温蠕变期间γ’相定向粗化行为研究[J]. 稀有金属材料与工程,2009,38.0(005):826-829.
APA 水丽,金涛,田素贵,&胡壮麒.(2009).011取向镍基单晶合金高温蠕变期间γ’相定向粗化行为研究.稀有金属材料与工程,38.0(005),826-829.
MLA 水丽,et al."011取向镍基单晶合金高温蠕变期间γ’相定向粗化行为研究".稀有金属材料与工程 38.0.005(2009):826-829.
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