Computational Study on Misfit Dislocation in Ni-Based Superalloys by Quasicontinuum Method

被引：6

作者：

Djuansjah, Joy R. P. ^{[1
]}

Yashiro, Kisaragi ^{[2
]}

Tomita, Yoshihiro ^{[2
]}

机构：

[1] Kobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 6578501, Japan

[2] Kobe Univ, Grad Sch Engn, Kobe, Hyogo 6578501, Japan

来源：

MATERIALS TRANSACTIONS | 2008年 / 49卷 / 11期

关键词：

misfit dislocation; gamma/gamma ' microstructure; Ni-based superalloys; quasicontinuum method;

D O I：

10.2320/matertrans.MB200821

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Misfit dislocation at the gamma/gamma' interface of Ni-based superalloys is investigated using the quasicontinuum simulation. In order to imitate the gamma' phases, nickel embedding function is modified by changing the lattice parameter, bulk modulus and cohesive energy simultaneously. Negative and positive misfits with different magnitudes are set in the simulations, Atomic structure at the interface, spatial distance and strain energy density at the core dislocation are in vestigated. Shear simulation is also conducted for a flat interface of gamma/gamma laminates, while the dislocation propagation and it's interaction with interface are analyzed. [doi:10.2320/matertrans.MB200821]

引用

页码：2507 / 2514

页数：8

共 26 条

[11] The quasicontinuum method: Overview, applications and current directions [J].

Miller, RE ;

Tadmor, EB .

JOURNAL OF COMPUTER-AIDED MATERIALS DESIGN, 2002, 9 (03) :203-239

[12] DIRECTIONAL COARSENING IN NICKEL-BASE SINGLE-CRYSTALS WITH HIGH-VOLUME FRACTIONS OF COHERENT PRECIPITATES [J].

POLLOCK, TM ;

ARGON, AS .

ACTA METALLURGICA ET MATERIALIA, 1994, 42 (06) :1859-1874

[13] CREEP RESISTANCE OF CMSX-3 NICKEL-BASE SUPERALLOY SINGLE-CRYSTALS [J].

POLLOCK, TM ;

ARGON, AS .

ACTA METALLURGICA ET MATERIALIA, 1992, 40 (01) :1-30

[14]

PUI KL, 1987, PHYS REV B, V35, P9190

[15] UNIVERSAL FEATURES OF THE EQUATION OF STATE OF METALS [J].

ROSE, JH ;

SMITH, JR ;

GUINEA, F ;

FERRANTE, J .

PHYSICAL REVIEW B, 1984, 29 (06) :2963-2969

[16]

Ross E.W., 1987, NICKEL BASE ALLOYS, P97

[17]

Voter A. F., 1987, Characterization of Defects in Materials Symposium, P175

[18]

VOTER AF, 1994, INTERMETALLIC COMPOU, V1, P77

[19]

Yashiro K, 2004, SOLID MECH APPL, V115, P59

[20] Molecular dynamics simulation of dislocation nucleation and motion at γ/γ′ interface in Ni-based superalloy [J].

Yashiro, K ;

Naito, M ;

Tomita, Y .

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 2002, 44 (09) :1845-1860

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