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First-principles study on the effects of twin boundaries on anodic dissolution of Mg
Ma, Hui; Liu, Min; Chen, Weiliang; Wang, Changgang; Chen, Xing-Qiu; Dong, Junhua; Ke, Wei
2019-05-17
Source PublicationPHYSICAL REVIEW MATERIALS
ISSN2475-9953
Volume3Issue:5
AbstractKnown experiments revealed that various deformation-induced defects in wrought Mg-based alloys indeed accelerate the corrosion rate. In particular, for Mg-based alloys the twinning mode under plastic deformation is the usually and more easily occurring one than other defects. However, to date it has been very difficult to study the specific effect of twin boundaries (TBs) on the corrosion behavior of Mg-based alloys due to the coexistence of other defects in wrought alloy. Here, through first-principles calculations we have theoretically investigated the effects of TBs on the anodic dissolutions of Mg metal. It has been found that the presence of various TBs (TB1{10 (1) over bar1}[1 (2) over bar 10], TB2 {10 (1) over bar2}[1 (2) over bar 10], or TB3 {10 (1) over bar3}[1 (2) over bar 10]) accelerates the corrosion rate and the TB-induced accelerations of the corrosion current density are indeed correlated with the TB interfacial length per area. Physically, the existence of the TBs on the specified surfaces increases the surface energy density, which implies that atoms at various TB-containing surfaces become less stable in energy as compared with the TB-free surface. In addition, we have analyzed that some alloying elements (As, Cd, Hg, Zn, and Sn) in combination with TBs can reduce the anodic dissolution rate, potentially enhancing the corrosion resistance of Mg-based alloys.
Indexed BySCI
Language英语
WOS IDWOS:000468238100005
PublisherAMER PHYSICAL SOC
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81085
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Ma, Hui,Liu, Min,Chen, Weiliang,et al. First-principles study on the effects of twin boundaries on anodic dissolution of Mg[J]. PHYSICAL REVIEW MATERIALS,2019,3(5).
APA Ma, Hui.,Liu, Min.,Chen, Weiliang.,Wang, Changgang.,Chen, Xing-Qiu.,...&Ke, Wei.(2019).First-principles study on the effects of twin boundaries on anodic dissolution of Mg.PHYSICAL REVIEW MATERIALS,3(5).
MLA Ma, Hui,et al."First-principles study on the effects of twin boundaries on anodic dissolution of Mg".PHYSICAL REVIEW MATERIALS 3.5(2019).
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