Microstructural statistics for fatigue crack initiation in polycrystalline nickel-base superalloys
Microstructural statistics for fatigue crack initiation in polycrystalline nickel-base superalloys
复制标题
多晶镍基高温合金疲劳裂纹萌生的微观结构统计
DOI：
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发表时间：
2017
影响因子：
2.5
通讯作者：
T. Pollock
中科院分区：
文献类型：
--
作者：
J. Stinville;W. Lenthe;M. Echlin;P. Callahan;D. Texier;T. Pollock
在先进的工程合金中，夹杂物和孔隙在加工过程中被最小化，由于循环载荷引起的裂纹的萌生转移到内在的微观结构特征。裂纹萌生点的识别标准，定义使用弹塑性加载参数和孪晶边界长度，已开发和应用到实验数据集循环加载。该标准成功地量化了实验观察到的裂纹的发生率。采用收敛方法定义了两种镍基高温合金IN100和René 88DT的统计微观结构体积元。由于较小的晶粒尺寸和较高的孪晶密度，René 88DT中捕获疲劳裂纹起始特征的材料元素小于IN 100。
In advanced engineering alloys where inclusions and pores are minimized during processing, the initiation of cracks due to cyclic loading shifts to intrinsic microstructural features. Criteria for the identification of crack initiation sites, defined using elastic-plastic loading parameters and twin boundary length, have been developed and applied to experimental datasets following cyclic loading. The criteria successfully quantify the incidence of experimentally observed cracks. Statistical microstructural volume elements are defined using a convergence approach for two nickel-base superalloys, IN100 and René 88DT. The material element that captures the fatigue crack-initiating features in René 88DT is smaller than IN100 due to a combination of smaller grain size and higher twin density.
影响因子：
9.4
作者：
Saikumar R. Yeratapally;M. Glavicic;M. Hardy;M. Sangid
通讯作者：
Saikumar R. Yeratapally;M. Glavicic;M. Hardy;M. Sangid
DOI：
10.1016/j.msea.2017.05.091
发表时间：
2017-06-24
影响因子：
6.4
作者：
Jiang, R.;Pierron, F.;Reed, P. A. S.
通讯作者：
Reed, P. A. S.