文档介绍：第39卷 2003年8月第8期 809—812页金属学放 ACTAMETALLURGICASINICA -812 定向凝固NiA1—28Cr一5Mo一1Hf合金的高温蠕变徐春梅郭建亭(中国科学院金属研究所,沈阳110016) 摘要研究了定向凝固NiA1— Cr(Mo)相和少量聚集在NiA1和Cr(Mo)相界处的Ni2A1Hf(Heusler), Monkman—Grant关系. 关键词 NiA1基金属间化合物,高温拉伸蠕变,蠕变断裂中图法分类号 TG146, 文献标识码 A 文章编号 0412—1961(2003)08—0809—04 HIGHTEMPERATURECREEPoFDIRECTIoNALI SoLIDIFIEDNiAl_28Cr-5M0—1HfALLoY XUChunmei,GUOJianting InstituteofMetalResearch,TheChineseAcademyofSciences,Shenyang110016 Correspondent:GUOJianting,professor,Tel:(024)23971917,E-mail:******@imr. ) Manuscriptreceived2002-09-—12—O2 ABSTRACT Themicrostructureandhightemperaturetensilecreepbehaviorofdirectionallysolid— ifledNiAl_28Cr一5M0r-,Cr(Mo1 phaseandasmallamountofNi2AlHf(Heusler)phasewhichdiscontinuouslydistributedatNiAland Cr(Mo)— larshapeofashortprimarycreepanddominantsteadycreepstages,thecreepstrainisrelativelylarge, andthemicrostructureofthepost-creepdeformationisnearlythesa4Tleasthatofpre-creepdefor— . Thecreepfracturedatafollow