TY - JOUR
T1 - In-situ 3D observation of hydrogen-assisted particle damage behavior in 7075 Al alloy by synchrotron X-ray tomography
AU - Wang, Yafei
AU - Toda, Hiroyuki
AU - Xu, Yuantao
AU - Shimizu, Kazuyuki
AU - Hirayama, Kyosuke
AU - Fujihara, Hiro
AU - Takeuchi, Akihisa
AU - Uesugi, Masayuki
N1 - Funding Information:
This work was supported by JST, CREST Grant Number JPMJCR 1995 Japan and JSPS KAKENH Grant Number JP21H04624. The synchrotron radiation experiments were performed at SPring-8 with the approval of Japan Synchrotron Radiation Research Institute through proposal number 2020A1796/1084. The authors would also like to thank Mr. Wataru Masumori for his contribution to the experiment and data analysis.
Funding Information:
This work was supported by JST, CREST Grant Number JPMJCR 1995 Japan and JSPS KAKENH Grant Number JP21H04624. The synchrotron radiation experiments were performed at SPring-8 with the approval of Japan Synchrotron Radiation Research Institute through proposal number 2020A1796/1084. The authors would also like to thank Mr. Wataru Masumori for his contribution to the experiment and data analysis.
Publisher Copyright:
© 2022
PY - 2022/4/1
Y1 - 2022/4/1
N2 - We directly captured, classified, and evaluated 3D particle debonding and fracture behavior in a H-charged 7075 Al alloy throughout the entire tensile deformation using synchrotron X-ray tomography and microstructural feature tracking techniques. The effects of particle size, shape, spatial clustering and stress state on strain-dependent particle damage were identified and isolated from each other. Moreover, state-of-the-art imaging and tracking techniques enabled the establishment of spatially and time-resolved hydrogen distributions during deformation. Based on realistic hydrogen partitioning among various nanoscopic trap sites, the contributions of particles to hydrogen trapping and the hydrogen effect at individual damaged particles were assessed quantitatively. Fracturing of coarse and irregular Al7Cu2Fe particles was found to be the predominant particle damage mode due to the spatial clustering and brittleness of these particles, but a hydrogen effect was not observed. The debonding of Mg2Si particles seemed to be the result of competition between hydrogen and clustering-induced stress localization, but detrimental effects of hydrogen on ductile fracture induced by accelerating interfacial debonding were found to be limited. The quantitative evaluation of particle damage in the present model material clarified a viable strategy for mitigating hydrogen embrittlement, which involves introducing and modifying intermetallic particles with strong hydrogen trapping capacities.
AB - We directly captured, classified, and evaluated 3D particle debonding and fracture behavior in a H-charged 7075 Al alloy throughout the entire tensile deformation using synchrotron X-ray tomography and microstructural feature tracking techniques. The effects of particle size, shape, spatial clustering and stress state on strain-dependent particle damage were identified and isolated from each other. Moreover, state-of-the-art imaging and tracking techniques enabled the establishment of spatially and time-resolved hydrogen distributions during deformation. Based on realistic hydrogen partitioning among various nanoscopic trap sites, the contributions of particles to hydrogen trapping and the hydrogen effect at individual damaged particles were assessed quantitatively. Fracturing of coarse and irregular Al7Cu2Fe particles was found to be the predominant particle damage mode due to the spatial clustering and brittleness of these particles, but a hydrogen effect was not observed. The debonding of Mg2Si particles seemed to be the result of competition between hydrogen and clustering-induced stress localization, but detrimental effects of hydrogen on ductile fracture induced by accelerating interfacial debonding were found to be limited. The quantitative evaluation of particle damage in the present model material clarified a viable strategy for mitigating hydrogen embrittlement, which involves introducing and modifying intermetallic particles with strong hydrogen trapping capacities.
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U2 - 10.1016/j.actamat.2022.117658
DO - 10.1016/j.actamat.2022.117658
M3 - Article
AN - SCOPUS:85125433883
VL - 227
JO - Acta Materialia
JF - Acta Materialia
SN - 1359-6454
M1 - 117658
ER -