δ-Mo49Ni51 phase in a Ni3Al based single crystal superalloy during thermal exposure

被引：0

作者：

Ou, M. ^{[1
]}

Li, S. ^{[1
]}

Pei, Y. ^{[1
]}

Ai, C. ^{[1
]}

Gong, S. ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

来源：

MATERIALS RESEARCH INNOVATIONS | 2014年 / 18卷

基金：

中国国家自然科学基金;

关键词：

Ni3Al based single crystal superalloy; delta-Mo49Ni51; phase; thermal exposure; TCP-PHASE; NI; GAMMA'; CREEP;

D O I：

10.1179/1432891714Z.000000000709

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the paper, the hexagonal delta-Mo49Ni51 phase had been investigated in a Mo-rich Ni3Al based single crystal superalloy with Re additions in 3-5 wt%. The delta-Mo49Ni51 phase was identified by transmission electron microscopy (TEM), scanning electron micrograph (SEM) and electron probe micro-analysis (EPMA). Before thermal exposure, the microstructure of the alloy was the cuboidal ordered gamma' phase in coherent with the disordered c matrix without any precipitation. During thermal exposure, the strip-like, faceted, plate-shaped delta-Mo49Ni51 phases significantly were precipitated. By the means of the composition analysis of TEM/EDS and EPMA/EDS, the elements Ni, Mo and Re were rich obviously in delta-Mo49Ni51 phase. Furthermore, the crystallography relationships between the delta-Mo49Ni51 phase and c phase have been reported.

引用

页码：395 / 399

页数：5

共 14 条

[1] In situ TEM observation of γ′, γ" and δ precipitations on Inconel 718 superalloy through HIP treatment [J].

Chang, Shih-Hsien .

JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 486 (1-2) :716-721

[2] A metallographic study of the Al-Ni-Re phase diagram [J].

Cornish, LA ;

Witcomb, MJ .

JOURNAL OF ALLOYS AND COMPOUNDS, 1999, 291 (1-2) :145-166

[3] Hot deformation characteristics of a polycrystalline γ-γ′-δ ternary eutectic Ni-base superalloy [J].

Detrois, Martin ;

Helmink, Randolph C. ;

Tin, Sammy .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 586 :236-244

[4] The Re (Ru)-rich 8-phase in Ru-containing superalloys [J].

Feng, Q ;

Nandy, TK ;

Pollock, TM .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 373 (1-2) :239-249

[5] Solidification of high-refractory ruthenium-containing superalloys [J].

Feng, Q ;

Nandy, TK ;

Tin, S ;

Pollock, TM .

ACTA MATERIALIA, 2003, 51 (01) :269-284

[6] Effects of heat treatment and Re-content on the TCP-phase in two Ni-Mo-Cr-Re superalloys [J].

Mao, Pingli ;

Xin, Yan ;

Han, Ke ;

Jiang, Weiguo .

ACTA METALLURGICA SINICA-ENGLISH LETTERS, 2009, 22 (05) :365-372

[7] Alloys-By-Design: Application to nickel-based single crystal superalloys [J].

Reed, R. C. ;

Tao, T. ;

Warnken, N. .

ACTA MATERIALIA, 2009, 57 (19) :5898-5913

[8] Tie-Line Compositions of the σ and (γ, δ) Phases in the Re-Cr-Ni System at 1573 K [J].

Saito, Shigeru ;

Takashima, Toshiyuki ;

Miyama, Katsumi ;

Kurokawa, Kazuya ;

Narita, Toshio .

MATERIALS TRANSACTIONS, 2011, 52 (12) :2174-2177

[9] TCP phase predictions in Ni-based superalloys: Structure maps revisited [J].

Seiser, B. ;

Drautz, R. ;

Pettifor, D. G. .

ACTA MATERIALIA, 2011, 59 (02) :749-763

[10] Microstructure and elevated temperature tensile behaviour of directionally solidified nickel based superalloy [J].

Sheng, L. Y. ;

Yang, F. ;

Xi, T. F. ;

Lai, C. ;

Guo, J. T. .

MATERIALS RESEARCH INNOVATIONS, 2013, 17 :S101-S106

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