Neutron diffraction study of stress-induced martensitic transformation and variant change in Fe-Pd

被引：35

作者：

Oliver, EC ^{[1
]}

Mori, T

Daymond, MR

Withers, PJ

机构：

[1] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[2] Univ Manchester, Manchester Mat Sci Ctr, Manchester M1 7HS, Lancs, England

[3] Univ Manchester, Manchester M1 7HS, Lancs, England

来源：

ACTA MATERIALIA | 2003年 / 51卷 / 20期

基金：

英国工程与自然科学研究理事会;

关键词：

Fe-Pd; shape memory alloys (SMA); martensitic phase transformation; neutron diffraction; residual stresses;

D O I：

10.1016/j.actamat.2003.08.017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Neutron diffraction spectra have been recorded in situ during tensile testing of polycrystalline Fe-30.5 at % Pd at a range of temperatures, in order to investigate stress-induced martensitic transformation and variant changes. The selective transformation of preferentially oriented austenite grains and martensite variants is identified and related to elasticity-based theory. Rietveld refinement is applied to determine the variation of elastic stiffness with temperature, revealing a significant increase in stiffness upon transformation to the martensite phase, in contrast to macroscopic measurements. (C) 2003 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：6453 / 6464

页数：12

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