Effects of Anisotropy on the Microstructural Characteristics and Mechanical Behavior of Shock-Loaded of AZ31 Alloy

Abstract:

Effects of anisotropy on the microstructural characteristics and mechanical behavior of shock loaded of AZ31 magnesium alloy have been investigated. Using electron backscatter diffraction, tension twinning was observed in both shock loading directions along the normal (ND) and rolling directions (RD). Compression tests were carried out along ND and RD in both as-received and post-shock conditions. It indicated that the RD samples show a more notable hardening behavior compared to the as-received conditions. Moreover, it is postulated here that detwinning results in a drop of strain-hardening rate for the ND samples under post shock reload conditions and tension twinning formed during the shock wave loading process leads to a significant moving left of the peak strain hardening rate for the RD samples under post shock reload conditions.

• Periodical: Advanced Materials Research (Volumes 284-286)
• Pages: 1537-1541
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.284-286.1537
• Online since: July 2011
• Authors: Min Hao, Fan Zhang, Cheng Wen Tan, Tie Jian Su, Xiao Dong Yu
• Keywords: Twinning, Anisotropy, AZ31 Alloy, Electron Backscatter Diffraction (EBSD), Shock Wave Loading

References

[1] Tension twinning formed when shock loading along ND and RD and the twinning volume fraction for the RD is larger compare to the ND samples.

[2] The stress–strain curves exhibited strong anisotropy under as-received and post-shock reload conditions and more notable hardening along the RD. Moreover, under post shock reload condition the strain hardening rate along the ND is lower than which under as-received, while a significant left moving of the peak strain-hardening rate for the RD samples.

DOI: 10.1021/acsomega.1c03127.s001

[3] It is postulated here that detwinning results in a drop of strain-hardening rate for the ND samples, while tension twinning formed during the shock wave loading process leads to a significant moving left of the peak strain hardening rate for the RD samples under post shock reload conditions. Acknowledgements This work was financially supported by the National Natural Science Foundation (51001014). References