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In situ X-ray diffraction study of deformation and shape recovery in the aged U–6.2wt%Nb alloy

Published online by Cambridge University Press:  30 January 2017

Y. Z. Zhang ,
D. P. Wang ,
W. J. Guan ,
X. L. Chen  and
X. L. Wang
Y. Z. Zhang*
Affiliation:
Science and Technology on Surface Physics and Chemistry Laboratory, P.O. Box 9071-35, Mianyang 621907, China
D. P. Wang
Affiliation:
Science and Technology on Surface Physics and Chemistry Laboratory, P.O. Box 9071-35, Mianyang 621907, China
W. J. Guan
Affiliation:
Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, China
X. L. Chen
Affiliation:
Institute of Materials, China Academy of Engineering Physics, Mianyang 621900, China
X. L. Wang*
Affiliation:
China Academy of Engineering Physics, Mianyang 621900, China
*
a)Author to whom correspondence should be addressed. Electronic mail: yanzhizh@163.com; xlwang@caep.cn
a)Author to whom correspondence should be addressed. Electronic mail: yanzhizh@163.com; xlwang@caep.cn
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Abstract

The present work focuses on the deformation and recovery mechanisms of aged monoclinic U–Nb alloy under tension and load–unload cycle testing using in situ X-ray diffraction (XRD). The U–6.2wt% Nb (U–6.2Nb) alloy was prepared and aged at 200 °C, and then underwent tensile testing followed by the in situ XRD. The experimental results indicate that the change of diffraction peaks can serve to accurately characterize the macroscopic deformation and recovery. Compared with the as-quenched alloy, the aged U–6.2Nb alloy displays different behavior during deformation and subsequent recovery. Phase transformation competes with twin rearrangement to dominate the deformation and recovery between elastic stage and slip stage of the alloy. The lattice plane relationship between α″ and γ° during phase transformation has also been given.

Keywords

deformationrecoveryU–Nb alloyX-ray diffraction
Type
Technical Articles
Information
Powder Diffraction , Volume 32 , Issue 2 , June 2017 , pp. 72 - 77
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Copyright
Copyright © International Centre for Diffraction Data 2017 

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