Microstructure and creep properties of Ni-based single-crystal superalloys with Mo/Al addition at 760 °C/850 MPa

被引：7

作者：

Cao, Pei-Shan ^{[1
]}

Wang, Hui ^{[1
]}

Ru, Yi ^{[1
]}

Liang, Yun-Fei ^{[1
]}

Gong, Sheng-Kai ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Key Lab Aerosp Mat & Performance, Minist Educ, Beijing 100191, Peoples R China

来源：

RARE METALS | 2023年 / 42卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Ni-based single-crystal superalloy; Transmission electron microscopy; Stacking faults; Mo and Al addition; Creep rupture properties; MATRIX DISLOCATIONS; ELECTRON-MICROSCOPY; STACKING-FAULTS; NICKEL; BEHAVIOR; SHEAR; RU;

D O I：

10.1007/s12598-018-1094-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of Mo and Al addition on the microstructure as well as creep rupture properties at 760 degrees C/850 MPa was investigated by transmission electron microscopy (TEM) in a Ni-based single-crystal (SC) alloy with the composition of Ni-6.5Al-8.0Mo-2.4Cr-6.2Ta-4.9Co-1.5Re-(0.01-0.05)Y (wt%). The microstructure analysis shows that 0.5 wt% Al addition induces rapid decrease in creep rupture life, and this can be attributed to the formation of dense stacking faults cutting into gamma ' precipitates, which can be explained by the increase in Orowan stress caused by the narrower gamma channel width and the decrease in stacking faults energy. Besides, 1.5 wt% Mo addition increases the anti-phase boundary energy and decreases the stacking faults energy, resulting in fewer stacking faults and thus a slight decrease in the creep rupture life.

引用

页码：3806 / 3813

页数：8

共 36 条

[21]

Pollock TM, 2002, DISLOCATIONS IN SOLIDS, VOL 11, P547

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

POLLOCK, TM ;

ARGON, AS .

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

[23] Primary creep in single crystal superalloys: Origins, mechanisms and effects [J].

Rae, C. M. F. ;

Reed, R. C. .

ACTA MATERIALIA, 2007, 55 (03) :1067-1081

[24] On the primary creep of CMSX-4 superalloy single crystals [J].

Rae, CMF ;

Matan, N ;

Cox, DC ;

Rist, MA ;

Reed, RC .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2000, 31 (09) :2219-2228

[25] The role of stacking fault shear in the primary creep of [001]-oriented single crystal superalloys at 750°C and 750 MPa [J].

Rae, CMF ;

Matan, N ;

Reed, RC .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 300 (1-2) :125-134

[26] 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

[27]

Reed RC., 2008, The Superalloys: Fundamentals and Applications, P2

[28] High temperature tensile properties of a series of nickel-base superalloys on a gamma/gamma' tie line [J].

Ro, Y ;

Koizumi, Y ;

Harada, H .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1997, 223 (1-2) :59-63

[29] Modeling solid solution strengthening in nickel alloys [J].

Roth, HA ;

Davis, CL ;

Thomson, RC .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1997, 28 (06) :1329-1335

[30]

Sondhi SK., 2011, Modell Simul Mater Sci Eng, V19, P7

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