The strength of nanocrystalline metals with and without flaws

被引：229

作者：

Sanders, PG ^{[1
]}

Youngdahl, CJ ^{[1
]}

Weertman, JR ^{[1
]}

机构：

[1] NORTHWESTERN UNIV, EVANSTON, IL 60208 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1997年 / 234卷

关键词：

nanocrystalline metals; flaws; strength values;

D O I：

10.1016/S0921-5093(97)00185-8

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The expectation of large grain-boundary strengthening and extensive grain-boundary sliding has motivated a number of studies of the mechanical properties of nanocrystalline metals. However, poor sample quality frequently has led to results that are far removed from the actual mechanical behavior of the flaw-free material. Several examples, involving elastic moduli, hardness, and yield strength, are given. Recent tests in compression of high density nanocrystalline metals have shown high hardness and yield strength values that are compatible with extrapolation of coarse-grain Hall-Fetch data to the nanocrystalline regime. (C) 1997 Elsevier Science S.A.

引用

页码：77 / 82

页数：6

共 28 条

[1]

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[2]

Anderson O, 1973, Elastic constants and their measurements

[3] GLASSLIKE BEHAVIOR IN A NANOSTRUCTURED FE/CU ALLOY [J].