The flow stress of AZ41M (Mg-Al-Zn-Mn-Ca) and ZK 60 (Mg-Zn-Zr) wrought magnesium alloys under the deformation conditions of twin rolling casting and hot compression at different temperature and strain rates was studied. Deformation behavior and failure mechanism of them were discussed. Microstructure evolutions were analyzed by optical microstructure and electron backscatter diffraction technique. The results have indicated that AZ41M and ZK 60 have different strain-stress curve under the same conditions. Working hardening results in occurrence of cracks in or around the shear bands. The recrystallized, equiaxed, and fined grains in shear bands attribute to recovery and recrystallization, grains refinement causes local working hardening as well as decreases of crack tip driving forces. Stress concentrated in shear bands causes crack initiation and propagation. Nucleus of cracks due to casting defects is another failure mode. With the increase of strain, dislocation rearranged in subgrain level while the low angle grain boundaries continuously evolved into high angle grain boundaries.
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October 2012
Research-Article
Deformation Behavior and Failure Analysis of Wrought Magnesium During Twin Rolling Casting and Hot Compression
Shouren Wang,
Shouren Wang
1
School of Mechanical Engineering,
e-mail: sherman0158@tom.com
University of Jinan
,Ji’nan 250022
, China
e-mail: sherman0158@tom.com
1Corresponding author.
Search for other works by this author on:
JaeHyung Cho,
JaeHyung Cho
Korea Institute of Materials Science
,66 Sangnam-dong
,Changwon 641010
, Korea
Search for other works by this author on:
Liying Yang
Liying Yang
School of Mechanical Engineering,
University of Jinan
,Ji’nan 250022
, China
Search for other works by this author on:
Shouren Wang
School of Mechanical Engineering,
e-mail: sherman0158@tom.com
University of Jinan
,Ji’nan 250022
, China
e-mail: sherman0158@tom.com
JaeHyung Cho
Korea Institute of Materials Science
,66 Sangnam-dong
,Changwon 641010
, Korea
Liying Yang
School of Mechanical Engineering,
University of Jinan
,Ji’nan 250022
, China
1Corresponding author.
Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received February 4, 2010; final manuscript received June 15, 2011; published online August 9, 2012. Assoc. Editor: Mohammad A. Khaleel.
J. Eng. Mater. Technol. Oct 2012, 134(4): 041002 (5 pages)
Published Online: August 9, 2012
Article history
Received:
February 4, 2010
Revision Received:
June 15, 2011
Citation
Wang, S., Kang, S. B., Cho, J., Guo, P., and Yang, L. (August 9, 2012). "Deformation Behavior and Failure Analysis of Wrought Magnesium During Twin Rolling Casting and Hot Compression." ASME. J. Eng. Mater. Technol. October 2012; 134(4): 041002. https://doi.org/10.1115/1.4004489
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