The influence of Ni on the microstructure of Co-base ODS alloys

被引：2

作者：

Zhang, Lin ^{[1
]}

He, Xinbo ^{[1
]}

Qin Mingli ^{[1
]}

Liu, Ye ^{[1
]}

Qu, Xuanhui ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Beijing Key Lab Powder Met & Particulate Mat, Beijing 100083, Peoples R China

来源：

ADVANCED ENGINEERING MATERIALS II, PTS 1-3 | 2012年 / 535-537卷

关键词：

Cobalt base alloy; Mechanical alloying; Oxide dispersion strengthening; gamma ' precipitates; Microstructure; HIGH-TEMPERATURE STRENGTH; W SYSTEM; SUPERALLOY; GAMMA'; PHASE;

D O I：

10.4028/www.scientific.net/AMR.535-537.1011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Co-based ODS alloys strengthened by gamma' precipitates and nanosized oxides are promising high-temperature structural materials. Single solid solution of Al and W in the matrix can not be achieved after mechanical alloying, resulting in the formation of low volume fraction of gamma' phase and several kinds of secondary phases. The addition of Ni promotes the precipitation of gamma' phase and reduces the amount of secondary phases by the enlargement of the solid solution limit of Al and W within the matrix. In comparison with the lower fracture strength and cleavage fracture mode of the alloy without the addition of Ni, Ni-containing Co-base ODS alloys exhibit much higher fracture strength and obvious ductile facture mode.

引用

页码：1011 / 1014

页数：4

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