MICROSTRUCTURE AND PROPERTIES OF A CREEP-RESISTANT, CAST GAMMA-TITANIUM ALUMINIDE

被引：22

作者：

BHOWAL, PR ^{[1
]}

MERRICK, HF ^{[1
]}

LARSEN, DE ^{[1
]}

机构：

[1] HOWMET CORP, WHITEHALL, MI USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1995年 / 192卷

关键词：

CREEP; TITANIUM; ALUMINUM;

D O I：

10.1016/0921-5093(94)03287-4

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The microstructure and mechanical properties of an investment cast gamma-aluminide containing small amounts of W, Mo and Si are described and a comparison is made with typical two-phase, first-generation aluminides exemplified by Ti-47Al-2Nb-2Cr, Ti-47Al-2Nb-2Mn and Ti-47Al-2Nb-2Mn-0.8vol%TiB2 (all in at.% unless indicated otherwise). Tensile tests show that the W-Mo-Si aluminide has good ductility and is intermediate in strength between the first-generation aluminides and a Ti-46Al-5Nb-1W aluminide. X-Ray diffraction analysis of the W-Mo-Si aluminide indicates the presence of the B-2 phase which is enriched in W, Mo, Mn and Nb. The B-2 precipitates are present at the lamellar colony boundaries as well as at the lamellar alpha(2)/gamma interfaces.

引用

页码：685 / 690

页数：6

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