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Effect of temperature on deformation mechanisms of the Mg88Co5Y7 alloy during hot compression
Peng, Z. Z.; Jin, Q. Q.; Shao, X. H.; Zhou, Y. T.; Zheng, S. J.; Zhang, B.; Ma, X. L.
2019-05-01
Source PublicationMATERIALS CHARACTERIZATION
ISSN1044-5803
Volume151Pages:553-562
AbstractThe deformation mechanisms and microstructure evolution of Mg88Co5Y7 (at.%) alloy with long period stacking ordered (LPSO) phase during compression at 373-673 K have been studied using transmission electron microscopy. The alloy consists of alpha-Mg matrix, interdendritic LPSO phase, and other Mg-Co-Y intermetallic compounds. Increasing temperature leads to a general decrease in strength of the Mg88Co5Y7 alloy. A large number of {10 (1) over bar2} tension twins and deformation bands are activated in the matrix, whereas basal slip and deformation kink dominate in the LPSO structures during compression at 373 and 473 K. Non-basal slip in matrix and almost no dynamic recrystallization are responsible for high strength and the good ductility of sample deformed at 573 K. Recrystallization of Mg matrix occurs upon deformation at 673 K, dramatically lowering the corresponding strength. Further, the grain boundary pinning effect from LPSO phase, MgYCo4 phase, and broken Mg-3(Co, Y) segments is supposed to account for the relatively high strength of Mg88Co5Y7 alloy at high temperatures.
KeywordMagnesium alloy LPSO structure Deformation twin Recrystallization Intermetallics
Indexed BySCI
Language英语
WOS IDWOS:000467668600059
PublisherELSEVIER SCIENCE INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81128
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Peng, Z. Z.,Jin, Q. Q.,Shao, X. H.,et al. Effect of temperature on deformation mechanisms of the Mg88Co5Y7 alloy during hot compression[J]. MATERIALS CHARACTERIZATION,2019,151:553-562.
APA Peng, Z. Z..,Jin, Q. Q..,Shao, X. H..,Zhou, Y. T..,Zheng, S. J..,...&Ma, X. L..(2019).Effect of temperature on deformation mechanisms of the Mg88Co5Y7 alloy during hot compression.MATERIALS CHARACTERIZATION,151,553-562.
MLA Peng, Z. Z.,et al."Effect of temperature on deformation mechanisms of the Mg88Co5Y7 alloy during hot compression".MATERIALS CHARACTERIZATION 151(2019):553-562.
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