γ′/γ" Co-precipitation in Inconel 706 alloy:: A 3D finite element study

被引：27

作者：

Kindrachuk, V ^{[1
]}

Wanderka, N ^{[1
]}

Banhart, J ^{[1
]}

机构：

[1] Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 417卷 / 1-2期

关键词：

3D finite element method; misfit; coarsening; interface; Ni-Fe based superalloy;

D O I：

10.1016/j.msea.2005.10.062

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The development of intermetallic gamma', gamma" precipitates and gamma'/gamma" co-precipitates in Inconel 706 during exposure at a service temperature of 750 degrees C is investigated. The distributions of elastic strain energy and mean normal stresses around the interfaces of precipitates arise from the lattice-mismatch and are calculated by means of three-dimensional finite element (FE) analysis. The highest energy density is found at the gamma'/gamma and gamma"/gamma interfaces. The total strain energy per gamma" and gamma' precipitates in matrix is three times larger as the total strain energy per gamma'/gamma" co-precipitate. We find that a gamma"-precipitate is energetically unstable and tends to merge with a gamma'-precipitate creating a gamma'/gamma" co-precipitate. The long-range stress field can considerably reduce the mean normal stresses around gamma"/gamma interfaces. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：82 / 89

页数：8

共 18 条

[1]

BARANSKI T, 2003, STUDIENARBEIT, P99

[2]

Brooks H., 1952, METAL INTERFACES, P20

[3] Finite element analysis of stresses associated with transformations in magnesia partially stabilized zirconia [J].

Chen, CR ;

Li, SX ;

Zhang, Q .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1999, 272 (02) :398-409

[4] MORPHOLOGY OF Y' AND Y'' PRECIPITATES AND THERMAL-STABILITY OF INCONEL 718 TYPE ALLOYS [J].

COZAR, R ;

PINEAU, A .

METALLURGICAL TRANSACTIONS, 1973, 4 (01) :47-59

[5] Determination of matrix and precipitate elastic constants in (γ-γ′) Ni-base model alloys, and their relevance to rafting [J].

Fahrmann, M ;

Hermann, W ;

Fahrmann, E ;

Boegli, A ;

Pollock, TM ;

Sockel, HG .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1999, 260 (1-2) :212-221

[6] Microstructure-based 3D finite element modelling of lattice misfit and long-range internal stresses in creep-deformed nickel-base superalloy single crystals [J].

Feng, H ;

Biermann, H ;

Mughrabi, H .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1996, 214 (1-2) :1-16

[7]

Helms AD, 1996, SUPERALLOYS 1996, P427

[8]

KHACHATURYAN AG, 1983, THEORY STRUCTURAL TR, pCH7

[9] Intragranular precipitation in Inconel 706:: 3D atom-probe and HRTEM investigations [J].

Kindrachuk, V ;

Wanderka, N ;

Banhart, J ;

Mukherji, D ;

Del Genovessè, D ;

Rösler, J .

STEEL RESEARCH INTERNATIONAL, 2004, 75 (01) :74-78

[10] ELASTIC STRAIN-ENERGY OF COHERENT ELLIPSOIDAL PRECIPITATES IN ANISOTROPIC CRYSTALLINE SOLIDS [J].

LEE, JK ;

BARNETT, DM ;

AARONSON, HI .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1977, 8 (06) :963-970

← 1 2 →