中文摘要：

低周期疲劳测试在单个水晶上被进行基于镍的 superalloy， DD6，与不同结晶的取向(即，[001 ] ，[011 ] ，并且[111 ]) 并且紧张居住类型(即，张力，压缩，并且平衡类型) 在某个高温度。给材料 anisotropy 和平均数应力，两个取向因素和压力范围被介绍给铁匠，沃森，并且更最高(SWT ) 强调模型预言疲劳生活。试验性的结果显示 DD6 的疲劳性质取决于结晶的取向和装载类型。疲劳生活张力，压缩，并且因为，平衡紧张居住测试比没有紧张居住的连续骑车测试的那些缺少重要爬效果。建议修改 SWT 压力方法的预言的结果与试验性的数据同意很好。

英文摘要：

Low cycle fatigue tests were conducted on the single crystal nickel-based superalloy, DD6, with different crystallographic orientations （i.e., [001], [011], and [111]） and strain dwell types （i.e, tensile, compressive, and balanced types） at a certain high temperature. Given the material anisotropy and mean stress, both orientation factor and stress range were introduced to the Smith, Watson, and Topper （SWT） stress model to predict the fatigue life. Experimental results indicated that the fatigue properties of DD6 depend on both crystallographic orientation and loading types. The fatigue life of the tensile, compressive, and balanced strain dwell tests are shorter than those of continuous cycling tests without strain dwell because of the important creep effect. The predicted results of the proposed modified SWT stress method agree well with the experimental data.