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The mechanism of the influence of Bi(or Sb) and rare earth on high temperature performance of AZ91 magnesium alloy
Alternative TitleThe mechanism of the influence of Bi(or Sb) and rare earth on high temperature performance of AZ91 magnesium alloy
Zhang GuoYing1; Zhang Hui1; Wei Dan1; Luo ZhiCheng1; Li YuCai2
2009
Source PublicationACTA PHYSICA SINICA
ISSN1000-3290
Volume58Issue:1Pages:444-449
AbstractThe atomic structure models of a matrix and the symmetric 0001 tilt boundary in AZ91 magnesium alloy were set up by using the concept of coincidence-site lattice (CSL). The total structure energy of a matrix and the grain boundary (GB), the environment sensitive embedding energies (E(ESE)) of alloy elements and the interaction energies between the atom clusters were calculated by using recursion method. Calculation results show that the cluster formed by Al and RE in bulk AZ1 Magnesium alloy is rather stable, but the cluster of Al, Bi (or Sb) and RE atom is unstable. When Bi(or Sb) and RE atoms coexist in AZ91 magnesium alloy, Bi or Sb will combine with RE to form dispersed particles which are mainly RE(2)Bi (or RE(2)Sb) and RE-Sb(or RE-Bi) distributed at the grain boundary, and Al(11)RE(3) will form in the bulk in AZ91 magnesium alloy. The consumption of Al in magnesium alloy inhibits the formation of the discontinuous precipitate phase Mg(17)Al(12). The melting points of compounds formed by RE and Al (or Bi, Sb) are high, thus the high temperature performance of AZ91 magnesium alloy would be obviously improved.
KeywordMICROSTRUCTURE RE electronic theory grain boundary aggregation alloy elements high temperature performance
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Science Research Program of the Education Bureau of Liaoning Province of China]
CSCD IDCSCD:3488183
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/143618
Collection中国科学院金属研究所
Affiliation1.沈阳师范大学
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhang GuoYing,Zhang Hui,Wei Dan,et al. The mechanism of the influence of Bi(or Sb) and rare earth on high temperature performance of AZ91 magnesium alloy[J]. ACTA PHYSICA SINICA,2009,58(1):444-449.
APA Zhang GuoYing,Zhang Hui,Wei Dan,Luo ZhiCheng,&Li YuCai.(2009).The mechanism of the influence of Bi(or Sb) and rare earth on high temperature performance of AZ91 magnesium alloy.ACTA PHYSICA SINICA,58(1),444-449.
MLA Zhang GuoYing,et al."The mechanism of the influence of Bi(or Sb) and rare earth on high temperature performance of AZ91 magnesium alloy".ACTA PHYSICA SINICA 58.1(2009):444-449.
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