Microstructures and mechanical properties of Fe-14Cr-3W-Ti-Y2O3 steel with 1 wt.% Cu addition fabricated by a new method

被引：5
|
作者：
Liu, Feng [1 ]
Liu, Yong [1 ]
Wen, Yuren [1 ,2 ]
Dou, Yuhai [1 ]
Zhao, Dapeng [1 ]
Liu, C. T. [3 ]
机构：
[1] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Tohoku Univ, Adv Inst Mat Res, World Premier Int WPI Res Ctr, Sendai, Miyagi 9808577, Japan
[3] Hong Kong Polytech Univ, Dept Mech Engn, Kowloon, Hong Kong, Peoples R China
来源：
JOURNAL OF NUCLEAR MATERIALS | 2011年 / 414卷 / 03期
关键词：
STRENGTHENED FERRITIC STEELS; TEMPORAL EVOLUTION; DEFORMATION; ALLOY; FE; PRECIPITATION; TEMPERATURES; SIZE;
D O I：
10.1016/j.jnucmat.2011.05.015
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effect of 1 wt.% copper addition on microstructures and mechanical properties of Fe-14Cr-3W-0.4Ti-0.4Y(2)O(3) (wt.%) alloy has been investigated. Mechanically alloyed powders and pre-alloyed powders were blended and consolidated by hot extrusion. A bimodal grain structure with large grains (10-20 mu m) and nanometer grains was formed. Through aging treatment, epsilon-Cu phase with face cubic centered lattice structure precipitated from the supersaturated solid solution. After aging for 6 h, the microhardness reached a peak value of HV326, which was attributed to precipitation of copper-rich phase. The alloy exhibited a high strength due to the strengthening of both copper-rich precipitates and Y-Ti-O nanoclusters, and an excellent ductility due to its bimodal structure. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：422 / 425
页数：4
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