Effect of frequency on amplitude-dependent internal friction in niobium

被引：7

作者：

Ide, Naoki ^{[1
]}

Atsumi, Tomohiro ^{[1
]}

Nishino, Yoichi ^{[1
]}

机构：

[1] Nagoya Inst Technol, Dept Mat Sci & Engn, Showa Ku, Nagoya, Aichi 4668555, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 442卷 / 1-2期

关键词：

internal friction; damping; microplasticity; flow stress; strain rate; non-destructive testing;

D O I：

10.1016/j.msea.2006.03.117

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Amplitude-dependent internal friction (ADIF) was measured in a polycrystalline niobium using four modes of flexural vibration from the fundamental to the third-order resonance at room temperature. The ADIF was detected in each vibration mode. The internal-friction versus strain-amplitude curve of the ADIF shifted to a larger strain-amplitude range as frequency increased. The stress-strain curves were derived from the ADIF data, and the microplastic flow stress defined as the stress required to produce a plastic strain of 1 x 10(-9) was read from the stress-strain curves. It was found that the microplastic flow stress was proportional to the frequency. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：156 / 159

页数：4

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