Synthesis of high-strength bimodally grained iron by mechanical alloying and spark plasma sintering

被引：67
作者：
Srinivasarao, B. [1 ]
Oh-ishi, K. [2 ]
Ohkubo, T. [2 ]
Mukai, T. [2 ]
Hono, K. [1 ,2 ]
机构：
[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3050047, Japan
[2] Natl Inst Mat Sci, Sengen Site, Tsukuba, Ibaraki 3050047, Japan
来源：
SCRIPTA MATERIALIA | 2008年 / 58卷 / 09期
基金：
日本科学技术振兴机构;
关键词：
mechanical alloying; spark plasma sintering; nanocrystalline alloy; bimodal distribution; atom probe;
D O I：
10.1016/j.scriptamat.2007.12.016
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Nanocrystalline iron synthesized by mechanical alloying and spark plasma sintering exhibited high yield and ultimate compressive strengths of 2.59 and 3.08 GPa, respectively, with a total true strain of 0.05. Partial recrystallization led to a true strain of 0.4 with a lower strength of 2.25 GPa. A bimodal grain size distribution consisting of average fine grains of 2.5 mu m and nanograins of 85 run is attributed to the combined high strength and large plastic strain. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：759 / 762
页数：4
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