THE CREEP─DAMAGE BEHAVIOUR FOR SINGLE CRYSTAL NICKEL-BASE SUPERALLOY

Acta Metall Sin

1995, Vol. 31

Issue (8): 370-375 DOI:

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THE CREEP─DAMAGE BEHAVIOUR FOR SINGLE CRYSTAL NICKEL-BASE SUPERALLOY

YUE Zhufeng;LU Zhenzhou;ZHENG Changqing(Northwestern Polytechnical University;Xi＇an 710072)

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YUE Zhufeng;LU Zhenzhou;ZHENG Changqing(Northwestern Polytechnical University;Xi＇an 710072). THE CREEP─DAMAGE BEHAVIOUR FOR SINGLE CRYSTAL NICKEL-BASE SUPERALLOY. Acta Metall Sin, 1995, 31(8): 370-375.

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Abstract Based on the micro-change of material internal structure of nickel-base single crystal superalloy in the creep condition.a two-state-variable creep damage constitution considering simultaneously material-type damage and void-type damage has been built .Confirmed by the experiments of single crystal DD3 along<001> crystallographic orientation at 760, 850 and 1000℃,the model can predict precisely the steady creep , the tertiary creep and the rupture characteristics.The lasting time of the steady creep and the onset time of the tertiary creep are approximately power law function of creep stresses.As the test temperature increases,the material-type damage and void-type damage increase rapidly.YUE Zhufeng, postdoctor,Post Box No.350, Northwestern Polytechnical University, Xi＇an 710072

Key words: single crystal nickel-base superalloy creep damage mechanism two-state-variable creep damage

Received: 18 August 1995

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1MackayRA．NASA-TM-83698,19872TienJK,CopleySM．MetallTransA,1971;2A:5433PollockTM,ArgonAS．ActaMetallMater,1992;40:14NathalMV,EbertLJ．MetallTransA,1985;16A:4275AiSH,LupincV,MaldiniM．ScrMetallMater,1992;26:5796岳珠峰．镍基单晶合金变形、损伤及破坏机理和力学研究,西北工业大学博士学位论文,1994

[1]	XingFu Yu. Microstructure Evolution of A Pre-compression Nickel-Base Single Crystal Superalloys During Tensile Creep[J]. 金属学报, 2008, 44(8): 961-967 .
[2]	TIAN Sugui ; ZHOU Huihua ; ZHANG Jinghua; YANG Hongcai ; XU Yongbo;HU Zhuangqi ( State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; The Chinese Academyof Sciences; Shenyang 110015)( Department of Materials Science and Engineering; Northeastern University ; Shenyang 110006)( Department of Materials Science and Engineering; Shenyang Polytechnic University; Shenyang 110023)Correspondent: TIAN Sugui; associate professor Tel: (024)5927399. A DIRECTIONAL COARSENING MECHANISM OF THE γ＇-PHASE DURING CREEP OF A SINGLE CRYSTAL NICKEL-BASE SUPERALLOY[J]. 金属学报, 1998, 34(6): 591-596.
[3]	TIAN Sugui;ZHOU Huihua;ZHANG Jinghua;YANG Hongcai;XU Yongbo;HU Zhuangqi (State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015)(Department of Materials Science and Engineering; Northeastern University; Shenyang 110006)(Department of Metal Materials and Engineering; Shenyang Polytechnic University; Shenyang 110023). DISLOCATION CONFIGURATION IN SINGLE CRYSTAL NICKEL-BASE ALLOY DUING PRIMARY CREEP[J]. 金属学报, 1998, 34(2): 123-128.
[4]	(TIAN Sugui ; ZHOU Huihua; ZHANG Jinghua;YANG Hongcai;XU YOngboHU Zhuangqi(State Key Laboratory for Fatigue and Fracture of Materials; Institute of Metal ReSearch; The Chinese Academyof Sciences; Shenyang 110015)(Department of Materials Sciences and Engineering; Northeastern University; Shenyang 110006)(Department of Metal Materials Engineering; Shenyang Polytechnic University 110023)Correspondent:TIAN Sugui; associate professor; Tel: (o24)-25927399; Fax: (024)e3891s2oManuscript received 1997-12-23; in revised form 1998-03-16. DIRECTIONAL COARSENING OF THE γ'-PHASE DURING COMPRESSION CREEP OF A SINGLE CRVSTAL NICKEL-BASE SUPERALLOY[J]. 金属学报, 1998, 34(12): 1261-1266.
[5]	TIAN Sugui;ZHOU Huihua; ZHANG Jinghua; YANG Hongcai; XU Yongbo; HU Zhuangqi (State key Laboratory for Fatigue and Fracture of Materials; Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110015)(Department of Materials Science and Engineering; Northeastern University; Shenyang 110006)(Department of Metal Materials Engineering; Shenyang Polytechnic University; Shenyang 110023). THE CREEP-DAMAGE BEHMIOUR OF A SINGLE CRYSTAL NICKEL-BASE SUPERALLOY[J]. 金属学报, 1998, 34(1): 57-62.

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