Effect of solution-treatment on microstructure and mechanical properties of cast fine-grain CM 247 LC superalloy

被引：19

作者：

Huang, HE ^{[1
]}

Koo, CH ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Mat Sci & Engn, Taipei 106, Taiwan

来源：

MATERIALS TRANSACTIONS | 2004年 / 45卷 / 04期

关键词：

Cannon-Muskegon 247 low-carbon superalloy; gamma ' particle; carbide; mechanical properties; solution-treament;

D O I：

10.2320/matertrans.45.1360

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study investigates the effect of the solution-treatment, with solution temperatures from 1494 to 1533 K, on the microstructure and mechanical properties of fine-grain (65 mum) CM 247 LC superalloy. Tensile tests reveal that the yield strength of the alloy after niulti-step 1527 K/2 h solution-treatment exceeds that after 1494 K/2 h solution-treatment. Additionally, the alloy after multi-step 1527 K/2 h solution-treatment had a lower creep rate and greater rupture life than that after 1494 K/2 h solution -treatment. The improved mechanical properties are attributed to the high volume fraction of gamma particles with the proper size and the refinement of carbides, which inhibit the gliding and climbing of dislocations.

引用

页码：1360 / 1366

页数：7

共 23 条

[1]

[Anonymous], SUPERALLOY

[2]

BALDAN A, 1992, Z METALLKD, V83, P750

[3] The effects of Mg microaddition on the mechanical behavior and fracture mechanism of MAR-M247 superalloy at elevated temperatures [J].

Bor, HY ;

Chao, CG ;

Ma, CY .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1999, 30 (03) :551-561

[4] The influence of magnesium on carbide characteristics and creep behavior of the Mar-M247 superalloy [J].

Bor, HY ;

Chao, CG ;

Ma, CY .

SCRIPTA MATERIALIA, 1997, 38 (02) :329-335

[5]

DOHERTY JE, 1971, JOM-J MIN MET MAT S, V23, P59

[6]

DUHI DN, 1971, J MET, V23, P38

[7]

EWING BA, 1984, P SUP 1984, P33

[8]

Gleiter H., 1968, MAT SCI ENG, V2, P285, DOI [DOI 10.1016/0025-5416(68)90047-5, 10.1016/0025-5416(68)90047-5]

[9]

HAGEL WC, 1964, IRON STEEL I SPEC, P98

[10]

HAM RK, 1970, ORDERED ALLOYS STRUC, P365

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