Creep fracture mechanism of TLP joint of a Ni-base single crystal superalloy

被引：29

作者：

Liu, Ji-De ^{[1
,2
]}

Jin, Tao ^{[1
]}

Li, Wen ^{[3
]}

Sun, Xiao-Feng ^{[1
]}

Guan, Heng-Rong ^{[1
]}

Hu, Zhang-Qi ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Dept Superalloy, Shenyang 110016, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

[3] Shenyang Ligong Univ, Mat Sci & Engn Coll, Shenyang 110168, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 457卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

high temperature alloys; creep property; microstructures; fracture;

D O I：

10.1016/j.jallcom.2007.03.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A kind of Ni-base single crystal superalloy was bonded by transient liquid-phase (TLP) process with Ni-Cr-B interlayer. The fracture process of TLP joint during creep test at 982 degrees C/248 MPa was investigated. Results show that due to assemble mismatch or original orientation discrepancy many subgrain boundaries can form in the bonding zone after bonding, and an amount of microporosities nucleate near those subgrain boundaries during creep deformation. With more creep deformation microcracks can initiate at those micropores. Propagation and interconnection of these microcracks result in the failure of TLP joint just at the bonding zone. The reasons for formation of those subgrain boundaries at bonding zone during isothermal solidification are also discussed. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：185 / 190

页数：6

共 13 条

[1] CREEP FRACTURE MECHANISMS IN SINGLE-CRYSTAL SUPERALLOYS [J].

AI, SH ;

LUPINC, V ;

MALDINI, M .

SCRIPTA METALLURGICA ET MATERIALIA, 1992, 26 (04) :579-584

[2]

EPISHIN A, 2002, P 7 C MAT ADV POW EN, P217

[3] THE CREEP-BEHAVIOR OF A NICKEL-BASED SINGLE-CRYSTAL SUPERALLOY [J].

HOPGOOD, AA ;

MARTIN, JW .

MATERIALS SCIENCE AND ENGINEERING, 1986, 82 (1-2) :27-36

[4] Creep rupture and fatigue properties of transient liquid phase bonded joints of Ni base single crystal superalloy [J].

Kim, DU ;

Nishimoto, K .

MATERIALS SCIENCE AND TECHNOLOGY, 2003, 19 (04) :456-460

[5] Growth of pores during the creep of a single crystal nickel-base superalloy [J].

Komenda, J ;

Henderson, PJ .

SCRIPTA MATERIALIA, 1997, 37 (11) :1821-1826

[6] Study of Ni-Cr-Co-W-Mo-B interlayer alloy and its bonding behaviour for a Ni-base single crystal superalloy [J].

Li, W ;

Jin, T ;

Sun, XF ;

Guo, Y ;

Guan, HR ;

Hu, ZQ .

SCRIPTA MATERIALIA, 2003, 48 (09) :1283-1288

[7]

LIU JD, 2006, P 8 LIEG C 2 FORSCH, P627

[8]

LIU JD, IN PRESS MAT CHARACT

[9] Isothermal solidification kinetics of diffusion brazing [J].

MacDonald, WD ;

Eagar, TW .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1998, 29 (01) :315-325

[10] ANALYSIS OF CAVITY GROWTH DURING SUPERPLASTICITY [J].

MILLER, DA ;

LANGDON, TG .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1979, 10 (12) :1869-1874

← 1 2 →