您目前所在的位置:首页 - 期刊简介 - 详细页面

铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 2    April 2002

[PDF Download]    [Flash Online]

    

Hardening mechanism of MP159 alloy
induced by aging
LU Shi-qiang(鲁世强)1, HUANG Bai-yun(黄伯云)2,
HE Yue-hui(贺跃辉)2, TANG Jian-cheng(唐建成)2

1.Department of Materials Science and Engineering,
Nanchang Institute of Aeronautical Technology,
Nanchang 330034, China;
2.State Key Laboratory for Powder Metallurgy,
Central South University, Changsha 410083, China

Abstract:The microstructural changes of both solution heat treated (ST) and cold worked (CW) MP159 alloy during aging were investigated by optical microscopy and transmission electron microscopy (TEM). The results indicate that both solution heat treated (ST) and cold worked (CW) MP159 alloy could be hardened by aging. This aging induced hardening is attributable to the precipitation of a very finely dispersed ordered cubic γ′ phase particles with only several nanometres in diameter. The hexagonal close packed (HCP) ε-martensite precipitated during aging of both CW MP159 and CW MP35N, and the hexagonal ordered Co3Mo phase of the DO19 structure type precipitated during aging of CW MP35N, have not bee n found in the present investigation.

 

Key words:  aging; hardening mechanism; MP159 alloy; cubic γ′ phase

ISSN 1672-7029
CN 43-1423/U

主管:中华人民共和国教育部 主办:中南大学 中国铁道学会 承办:中南大学
湘ICP备09001153号 版权所有:《铁道科学与工程学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市韶山南路22号 邮编:410075
电 话:0731-82655133,82656174   传真:0731-82655133   电子邮箱:jrse@mail.csu.edu.cn