Influence of test temperature on the size effect in molybdenum small-scale compression pillars

被引：46

作者：

Schneider, A. S. ^{[1
]}

Frick, C. P. ^{[2
]}

Arzt, E. ^{[3
,4
]}

Clegg, W. J. ^{[5
]}

Korte, S. ^{[5
,6
]}

机构：

[1] INM Leibniz Inst New Mat, Metall Microstruct Grp, D-66123 Saarbrucken, Germany

[2] Univ Wyoming, Dept Mech Engn, Laramie, WY 82071 USA

[3] INM Leibniz Inst New Mat, Funct Surfaces Grp, D-66123 Saarbrucken, Germany

[4] Univ Saarland, D-66123 Saarbrucken, Germany

[5] Univ Cambridge, Dept Mat Sci & Met, Gordon Lab, Cambridge CB2 3QZ, England

[6] Univ Erlangen Nurnberg, Dept Mat Sci & Engn, Inst Gen Mat Properties 1, D-91058 Erlangen, Germany

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2013年 / 93卷 / 06期

关键词：

size effect; bcc metals; critical temperature; molybdenum micropillars; FLOW-STRESS; MICROCOMPRESSION; DEFORMATION; STRENGTH; BEHAVIOR; PLASTICITY;

D O I：

10.1080/09500839.2013.777815

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Previous research has shown that body-centred cubic (bcc) metals exhibit a smaller size dependence of strength than what is commonly observed in face-centred cubic (fcc) metals. This work investigates compression testing of focused ion beam-manufactured molybdenum pillars ranging in size from 300nm to 5m, both above and below its critical temperature at 300 and 500K. At 500K the size effect is found to be consistent with what is observed in fcc metals, owing to the increased mobility of screw dislocations.

引用

页码：331 / 338

页数：8

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