STRAIN-AGING EMBRITTLEMENT OF THE ORDERED INTERMETALLIC COMPOUND NIAL

被引：28

作者：

BRZESKI, JM ^{[1
]}

HACK, JE ^{[1
]}

DAROLIA, R ^{[1
]}

FIELD, RD ^{[1
]}

机构：

[1] GE AIRCRAFT ENGINES,CINCINNATI,OH

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 170卷 / 1-2期

关键词：

D O I：

10.1016/0921-5093(93)90364-K

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The deformation behavior and fracture toughness of single crystals of the ordered intermetallic compound NiAl were investigated as functions of relatively low temperature thermal treatments. A strain aging embrittlement phenonenon, similar to that observed in mild steels, was identified. In the non-embrittled condition, tensile ductilities on the order of 7%-8% and fracture toughness values of 15-17 MPa m1/2 were obtained for crystals with a [110] axis tested at room temperature. Additional observations of serrated yielding during compression testing at temperatures between 100 and 200-degrees-C are consistent with strain aging induced by the low temperature diffusion of interstitial impurities or constitutional vacancies to dislocations, thus rendering them immobile at room temperature.

引用

页码：11 / 18

页数：8

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