一种镍基单晶高温合金压缩蠕变强度的各向异性  

ANISOTROPY OF COMPRESSION CREEP STRENGTH IN A NICKEL-BASE SINGLE CRYSTAL SUPERALLOY

作　　者：沙玉辉[1] 左良[1] 张静华[2] 徐永波[2] 胡壮麒[2] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004 [2]中国科学院金属研究所材料疲劳与断裂国家重点实验室,沈阳110016

出　　处：《金属学报》2001年第11期1142-1146,共5页Acta Metallurgica Sinica

基　　金：国家自然科学基金资助项目 59871052

摘　　要：研究了镍基单晶高温合金压缩蠕变强度的各向异性．结果表明，压缩蠕变强度的取向依赖性与温度有关，其由大到小的排序分别为：１０２３Ｋ－［１１０］，［１１１］，［００１］；１１２３Ｋ－［１１０］，［００１］，［１１１］，当蠕变速率小于８×１０－５ｓ－１时，［００１］与［１１０］间的各向异性减弱；１２２３Ｋ－［１１０］，［００１］，［１１１］，但［００１］与［１１０］间的各向异性变得非常弱，通过蠕变门槛应力分析，确定了上述取向在不同区域中的蠕变控制机制，拼据此解释了压缩蠕变强度的各向异性．The anisotropy of compression creep strength in a nickel-base single crystal superalloy was investigated. The results showed that the anisotropy of compression creep strength depends on temperature, which decreases in the following order: 1023 K-[110], [111], [001]; 1123 K-[110], [001], [111], while the anisotropy between [001] and [110] weakens as creep rate is lower than 8x10(-5) s(-1); 1223 K-[110], [001], [111], but the anisotropy between [001] and [110] becomes very weak. Through the analysis of creep threshold stress, the controlling creep mechanisms were determined, and by which the anisotropy of compression creep strength was explained.

关 键 词：镍基单晶高温合金 压缩蠕变强度 各向异性 门槛应力 

分 类 号：TG146.15[一般工业技术—材料科学与工程]