【作者】 李嘉荣； 赵金乾； 王开国； 刘世忠； 韩梅； 曹春晓；

【Author】 Li Jiarong Zhao Jinqian Wang Kaiguo Liu Shizhong Han Mei Cao Chunxiao (National Key Laboratory of Advanced High Temperature Structural Materials,BIAM,Beijing 100095,China)

【机构】 北京航空材料研究院先进高温结构材料国防科技重点实验室；

【摘要】 研究了第二代单晶高温合金 DD406(DD6)的[001]、[011]和[111]取向1070℃不同应力条件下的拉伸蠕变性能。结果表明：合金具有明显的蠕变各向异性；在相同的条件下,合金的蠕变寿命按[111]、 [011]、 [001]取向的顺序递减；合金的蠕变变形发生在基体通道与γ′相,并且γ′相发生了定向粗化,形成筏排；[001]和 [011]取向合金的γ′相粗化特征明显,而[111]取向合金的γ′相粗化无方向优势,粗化特征不明显。更多还原

【Abstract】 The creep properties of second generation single crystal superalloy DD406(DD6)with[001],[011]and[111] orientations have been investigated under different stresses at 1070℃.The results show that the creep properties of DD6 are ob- viously anisotropie.The creep time of the alloy decreases in the order of[111],[011],[001]under the same test condi- tions.The creep deformation of the alloy locates in the matrix channels and γ′ phases,and the directional coarsening of γ′ phase occurs and the rafting is formed.The directional coarsening of γ′ phase of the alloy with[001]and[011]orientations is obvious,while that with[111]orientation is not obvious.更多还原