Transient x-ray diffraction with simultaneous imaging under high strain-rate loading

被引：35

作者：

Fan, D. ^{[1
]}

Lu, L. ^{[1
,2
]}

Li, B. ^{[1
,2
]}

Qi, M. L. ^{[3
]}

E, J. C. ^{[1
]}

Zhao, F. ^{[1
]}

Sun, T. ^{[4
]}

Fezzaa, K. ^{[4
]}

Chen, W. ^{[5
,6
]}

Luo, S. N. ^{[1
]}

机构：

[1] Peac Inst Multiscale Sci, Chengdu 610207, Sichuan, Peoples R China

[2] Univ Sci & Technol China, Dept Modern Mech, Hefei 230027, Anhui, Peoples R China

[3] Wuhan Univ Technol, Sch Sci, Wuhan 430070, Hubei, Peoples R China

[4] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[5] Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA

[6] Purdue Univ, Sch Mat Sci Engn, W Lafayette, IN 47907 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2014年 / 85卷 / 11期

基金：

中国国家自然科学基金;

关键词：

HOPKINSON PRESSURE BAR; AZ31 MAGNESIUM ALLOY; DEFORMATION; FRACTURE; COMPRESSION;

D O I：

10.1063/1.4900861

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Real time, in situ, multiframe, diffraction, and imaging measurements on bulk samples under high and ultrahigh strain-rate loading are highly desirable for micro-and mesoscale sciences. We present an experimental demonstration of multiframe transient x-ray diffraction (TXD) along with simultaneous imaging under high strain-rate loading at the Advanced Photon Source beamline 32ID. The feasibility study utilizes high strain-rate Hopkinson bar loading on a Mg alloy. The exposure time in TXD is 2-3 mu s, and the frame interval is 26.7-62.5 mu s. Various dynamic deformation mechanisms are revealed by TXD, including lattice expansion or compression, crystal plasticity, grain or lattice rotation, and likely grain refinement, as well as considerable anisotropy in deformation. Dynamic strain fields are mapped via x-ray digital image correlation, and are consistent with the diffraction measurements and loading histories. (C) 2014 AIP Publishing LLC.

引用

页数：5

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