Micropillar compression deformation of single crystals of Co3(Al,W) with the L12 structure

被引：26

作者：

Chen, Zhenghao M. T. ^{[1
]}

Okamoto, Norihiko L. ^{[1
,2
]}

Demura, Masahiko ^{[3
]}

Inui, Haruyuki ^{[1
,2
]}

机构：

[1] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan

[2] Kyoto Univ, Ctr Elements Strategy Initiat Struct Mat ESISM, Kyoto 6068501, Japan

[3] Natl Inst Mat Sci, 1-2-1 Sengen, Tsukuba, Ibaraki 3050047, Japan

来源：

SCRIPTA MATERIALIA | 2016年 / 121卷

基金：

日本科学技术振兴机构;

关键词：

Intermetallic compounds; Size dependence; Focused-ion beam (FIB); Critical resolved shear stress (CRSS); Yield stress anomaly (YSA); W-BASED ALLOYS; FLOW-STRESS; CREEP DEFORMATION; YIELD-STRESS; AL; TEMPERATURE; STRENGTH; BEHAVIOR; DEPENDENCE;

D O I：

10.1016/j.scriptamat.2016.04.029

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The compression deformation behavior of single-crystal micropillars of L1(2)-Co-3(Al,W) has been investigated at room temperature as a function of pillar size and crystal orientation. The critical resolved shear stress (CRSS) obeys an inverse power-law scaling against pillar size and is independent of orientation. With the bulk CRSS value of Co-3(Al,W) at room temperature estimated by extrapolating the size dependence of CRSS for micropillars, comparison of high-temperature strength is made on the CRSS values for Co-3(Al,W) and Ni3Al-based compounds. Co-3(Al,W) has turned out not to be strong enough to provide excellent high-temperature strength for Co-based superalloys, at least for ternary composition. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：28 / 31

页数：4

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