Finite element analysis of void growth behavior in nickel-based single crystal superalloys
Finite element analysis of void growth behavior in nickel-based single crystal superalloys
复制标题
镍基单晶高温合金空洞生长行为的有限元分析
DOI：
10.1016/j.commatsci.2010.02.028
复制
发表时间：
2010-05
影响因子：
3.3
通讯作者：
Hou, N. X.
中科院分区：
文献类型：
--
作者：
Yu, Q. M.;Yue, Z. F.;Hou, N. X.
建立了控制应力三轴度的非线性刚度法。在三维胞元模型的基础上，采用晶体塑性理论和非线性力学分析了镍基单晶高温合金中孔洞的长大行为。考虑了一系列因素，包括应力三轴度，初始体积分数的空隙，矿脉参数，晶体取向，滑移系激活和弹性各向异性。计算结果表明，这些因素影响着孔洞的长大特性。应力三轴度是孔洞长大的驱动力，对孔洞长大起着重要的作用。在低应力三轴度下，空洞变形主要表现为形状变化，在高应力三轴度下，空洞变形主要表现为体积膨胀。初始空穴体积分数对生长速率有显著影响。体积分数越小，生长速率越高。矿脉参数对孔洞的生长和形状变化有很大的影响。晶体取向和激活滑移系对孔洞的长大也有显著影响。{111}-110滑移系激活时的孔洞增长速率高于{111}-112滑移系激活时的孔洞增长速率。弹性各向异性对孔洞的生长起着重要的作用。在弹性各向同性基体中空穴的增长速度比在弹性各向异性基体中快。
Nonlinear stiffness method (NSM) was established to control the stress triaxiality. Based on the 3-D cell model, the void growth behavior in nickel-based single crystal superalloys (SXs) was analyzed with crystal plasticity theory and NSM. A range of factors were considered including stress triaxiality, initial volume fraction of voids, Lode parameters, crystallographic orientation, slip system activation and elastic anisotropy. The calculation results show that these factors influence the void growth character. The stress triaxiality is the driving force and plays an important role in void growth. At low stress triaxiality, the void deformation mainly exhibits as shape change, and at high stress triaxiality, it mainly exhibits as bulk expansion. The initial volume fraction of void influences the growth rate remarkably. The smaller the volume fraction is, the higher the growth rate is. The Lode parameter has great effect on the void growth and its shape change. The crystallographic orientation and activated slip systems have noticeable influence on the void growth, too. The void growth rate, when {111}〈110〉 slip system is activated, is higher than that when {111}〈112〉 slip system is activated. The elastic anisotropy plays an important role in void growth. The void grows faster in elastic isotropic matrix than that in elastic anisotropic matrix.
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影响因子：
9.8
作者：
X.-P. Xu;A. Needleman
通讯作者：
X.-P. Xu;A. Needleman
影响因子：
3.6
作者：
K.S Zhang;J.B Bai;D. François
通讯作者：
K.S Zhang;J.B Bai;D. François
DOI：
10.1088/0965-0393/13/6/007
发表时间：
2005-09
影响因子：
1.8
作者：
J S Wan;Z F Yue;Z. Z. Lu-Z.
通讯作者：
J S Wan;Z F Yue;Z. Z. Lu-Z.
影响因子：
5.3
作者：
R. Becker
通讯作者：
R. Becker
影响因子：
5.3
作者：
M. Worswick;R. Pick
通讯作者：
M. Worswick;R. Pick