Paper Title:
Activation Volume in Fine Grained Metals from Stress Relaxation and Nano-Indentation
  Abstract

Fine grained copper was studied using the stress relaxation technique and creep testing in nano-indentation, to determine the activation volume involved in the micro-mechanism of the deformation. This material exhibits a near-perfect elasto-plastic deformation, featured by a steep work-hardening, after the elastic domain, followed by flow at a constant stress. Measurements of the activation volumes in the various domains reveal the role of the dislocations and the variation in the dislocation density in the deformation mechanism. This emphasizes the importance, in the determination of the activation volume, of the deformation domain investigated as well as the testing technique used and whether in both cases, the measurement is carried out in a transient domain or condition where variation in dislocation density occurs.

  Info
Periodical
Materials Science Forum (Volumes 584-586)
Edited by
Yuri Estrin and Hans Jürgen Maier
Pages
399-404
DOI
10.4028/www.scientific.net/MSF.584-586.399
Citation
Y. Champion, S. Nowak, "Activation Volume in Fine Grained Metals from Stress Relaxation and Nano-Indentation", Materials Science Forum, Vols. 584-586, pp. 399-404, 2008
Online since
June 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: J.B. Wen, F.X. Chen, Ke Ke Zhang, Yong Shun Yang
Abstract:By means of superplastic tensile test above the Ac1 temperature (γ→α transformation temperature), superplastic deformation activation energy...
341
Authors: George C. Kaschner, Jeffrey C. Gibeling
Abstract:Strain rate jump tests were performed during low cycle fatigue using plastic strain rate as the real time computed control variable. Test...
371
Authors: Pavel Lukáč, Zuzanka Trojanová
Abstract:Stress relaxation tests have been used in order to determine parameters of a possible thermally activated process in AZ31 magnesium alloy....
101
Authors: Dipti Samantaray, Sumantra Mandal, S.K. Albert, A.K. Bhaduri, Tammana Jayakumar
Chapter 7: Materials Characterisation
Abstract:In this paper, the deformation behaviour of a high-nitrogen grade 316LN stainless steel (with 0.14%N) has been studied over a wide range of...
477
Authors: Zheng Cun Zhou, Q. Z. Wang, J. Du, H. Yang, Y.J. Yan
Chapter 13: Materials and Design
Abstract:The features of grain boundary relaxation of a (wt.%)Fe-25Cr-5Al alloy have been investigated using a multifunction internal friction...
2134