TY - JOUR
T1 - Influences of Hydrogen Micropores and Intermetallic Particles on Fracture Behaviors of Al-Zn-Mg-Cu Aluminum Alloys
AU - Su, Hang
AU - Yoshimura, Takuro
AU - Toda, Hiroyuki
AU - Bhuiyan, Md Shahnewaz
AU - Uesugi, Kentaro
AU - Takeuchi, Akihisa
AU - Sakaguchi, Nobuhito
AU - Watanabe, Yoshio
N1 - Funding Information:
The authors gratefully acknowledge the support from the New Energy and Industrial Technology Development Organization (part of the Technological Development of Innovative New Structural Materials, project HAJJ262715). The synchrotron radiation experiments are performed through proposal No. 2013B1027, No. 2013B1324, No. 2014A1018, and No. 2014B1157 with the approval of JASRI.
Publisher Copyright:
© 2016, The Minerals, Metals & Materials Society and ASM International.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - The combined effects of hydrogen micropores and intermetallic particles on the voids initiation and growth behavior of Al-Zn-Mg-Cu aluminum alloys during deformation and fracture are investigated with the help of the high-resolution X-ray tomography. It is interesting to note that the high-hydrogen concentration induced by an EDM cutting process results in the initiation of quasi-cleavage fracture near surface. With the increase of strain, the quasi-cleavage fracture is gradually replaced by dimple fracture. Voids initiation related to the dimple fracture is caused by both intermetallic particles fracture and interfacial debonding between particles and matrix. The nucleation of hydrogen micropores on intermetallic particles accelerates the voids initiation. The existence of triaxial stress ahead of the tip of a quasi-cleavage crack enhances growth rate for both hydrogen micropores and voids.
AB - The combined effects of hydrogen micropores and intermetallic particles on the voids initiation and growth behavior of Al-Zn-Mg-Cu aluminum alloys during deformation and fracture are investigated with the help of the high-resolution X-ray tomography. It is interesting to note that the high-hydrogen concentration induced by an EDM cutting process results in the initiation of quasi-cleavage fracture near surface. With the increase of strain, the quasi-cleavage fracture is gradually replaced by dimple fracture. Voids initiation related to the dimple fracture is caused by both intermetallic particles fracture and interfacial debonding between particles and matrix. The nucleation of hydrogen micropores on intermetallic particles accelerates the voids initiation. The existence of triaxial stress ahead of the tip of a quasi-cleavage crack enhances growth rate for both hydrogen micropores and voids.
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U2 - 10.1007/s11661-016-3773-3
DO - 10.1007/s11661-016-3773-3
M3 - Article
AN - SCOPUS:84988709995
SN - 1073-5623
VL - 47
SP - 6077
EP - 6089
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 12
ER -