金属学报  1985, Vol. 21 Issue (3): 45-53

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应力、温度对定向凝固镍基高温合金第一阶段蠕变量的影响

姚德良;林栋梁;孙传棋

上海交通大学;济南市职工业余大学;上海交通大学;北京航空材料研究所

EFFECT OF STRESS AND TEMPERATURE ON EXTENT OF PRIMARY CREEP IN DIRECTIONALLY SOLIDIFIED Ni-BASE SUPERALLOYS

YAO Deliang;LIN Dongliang(T.L.Lin);SUN Chanqi Shanghai Jiaotong University

姚德良;林栋梁;孙传棋. 应力、温度对定向凝固镍基高温合金第一阶段蠕变量的影响[J]. 金属学报, 1985, 21(3): 45-53.
, , . EFFECT OF STRESS AND TEMPERATURE ON EXTENT OF PRIMARY CREEP IN DIRECTIONALLY SOLIDIFIED Ni-BASE SUPERALLOYS[J]. Acta Metall Sin, 1985, 21(3): 45-53.

摘要 参考文献 相关文章 Metrics 全文: PDF(1805 KB)   摘要: 本文研究了温度,应力对定向凝固镍基高温合金的第一阶段蠕变量的影响.大多数镍基合金经定向凝固后,在中温(700—800℃)、高应力(490—784MN/m~2)下纵向的第一阶段蠕变量比普通铸造合金显著增大,这是由位错切过γ′粒子的蠕变机制所决定.定向凝固DZ-3合金的中温纵向蠕变量相当低,与普通铸造CCK3合金相同.这是由位错攀移越过γ粒子的蠕变机制所决定.所有定向凝固合金横向的第一阶段蠕变量与相应的普通铸造合金相同.γ/γ′点阵错配度愈大,强度水平愈高,定向凝固合金的纵向第一阶段蠕变量愈低.在高温(850—980℃)、低应力(196—343MN/m~2)下,定向凝固镍基高温合金的第一阶段蠕变量与普通铸造合金相当.高温下,所有合金第一阶段蠕变量也随蠕变应力提高而略有增加. Abstract：The primary creep strain(PCS)of most directionally solidified Ni-base super-alloys at intermediate temperature of 700-800℃ and high stress of 490-784MN/m~2 is evidently higher than that of conventionally cast alloys.That is due tothe shearing of the γ′particles and the large gliding distance of dislocations.PCSin creases with increasing stress.The longitudinal PCS of DZ3 at intermediatetemperature is quite low and similar to that of the conventionally cast CCK3alloy.Directional solidification does not increase the longitudinal PCS of K3alloy at intermediate temperature and high stress.This is due to the creep mechan-ism of dislocation climbing over γ′particles.PCS increases slightly with increas-ing creep stress.The transverse PCS of the directionally solidified alloys is thesame of the corresponding conventionally cast alloys.The larger the γ/γ′latticemisfit and the higher the strength,the lower the longitudinal PCS of directionallysolidified alloys.At high temperature of 850-980℃ and low stress of 196-343MN/m~2,the PCS of DS Ni-base superalloys is similar to that of conventionallycast alloys and increases slightly with the increasing creep stress. 收稿日期: 1985-03-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 姚德良 林栋梁 孙传棋 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1985/V21/I3/45 1 Leverant,E.R.;Duhl,D.N.,Metall.Trans.,2(1971) ,907． 2 Leverant,E.R.;Kear,B.H.,Metall.Trans.,1(1970) ,491． 3 林栋梁;姚德良,金属学报,15(1979) ,177． 4 林栋梁;姚德良;林先进;孙传棋,金属学报,18(1982) ,104． 5 航空材料研究所:上海交通大学,DZ-3合金的组织性能研究报告,1981． 6 Davidson,J.M.;Tien,J.K.,Metall.Trans.,12A(1981) ,865． 7 根本实;本多孝行;越后谷淳一;须藤一,日本金属学会志,44(1980) ,933． 8 渡边力藏;九重常男,铁と钢,61(1975) ,2274． 9 Brooks,H.,Metal Interfaces,ASM,1952,p.20． 10 Lasalmonie,A.;Strudel,J.L.,Philos.Mag.,32(1975) ,937． No related articles found! Viewed Full text Abstract Cited   Shared      Discussed