|The role of boron in modifying the solidification and microstructure of nickel-base alloy U720Li|
|Zhao, GD; Yu, LX; Yang, GL; Zhang, WH; Sun, WR; Sun, WR (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.
|Source Publication||JOURNAL OF ALLOYS AND COMPOUNDS
|Abstract||This study is focused on the effect of boron addition, in the range of 0.011 wt% to 0.048 wt%, on the solidification behavior and microstructure of U720Li alloy. It has been found that boron increased the eutectic (gamma + gamma') precipitation significantly, while reduces the formation of eta phase and Zr-rich particles precipitated in front of the eutectic (gamma + gamma') obviously. Boron greatly retards the gamma matrix solidification which is verified by the fact that it markedly reduces the 'segregated area' around the final liquid pool or eutectic (gamma + gamma'). Based on this phenomenon, boron is assumed to form a layer at the solid/liquid interface and inhibits the attachment of atoms to attach on or jumping off the solid front, and hence lowers the gamma matrix solidification rate. Boron increases the eutectic (gamma + gamma') precipitation mainly by retarding the gamma matrix solidification, which resulting in deeper undercooling and more eutectic forming elements such as Ti left in the residual liquids. Subsequently, boron reduces the eta-Ni3Ti and Zr-rich phase formation because the increasing eutectic (gamma + gamma') precipitation favors the consumption of Ti and dissolving Zr in gamma' phase. (C) 2016 Published by Elsevier B.V.|
; yu, lianxu
; yang, guoliang
; zhang, weihong
; sun, wenru] chinese acad sci, inst met res, shenyang 110016, peoples r china
; [zhao, guangdi] univ sci & technol china, sch materials sci & engn, hefei 230026, peoples r china
Eutectic (Gamma Plus Gamma')
|Subject Area||Chemistry, Physical
; Materials Science, Multidisciplinary
; Metallurgy & Metallurgical Engineering
|Corresponding Author||Sun, WR (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China.|
Zhao, GD,Yu, LX,Yang, GL,et al. The role of boron in modifying the solidification and microstructure of nickel-base alloy U720Li[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2016,686:194-203.
Zhao, GD,Yu, LX,Yang, GL,Zhang, WH,Sun, WR,&Sun, WR .(2016).The role of boron in modifying the solidification and microstructure of nickel-base alloy U720Li.JOURNAL OF ALLOYS AND COMPOUNDS,686,194-203.
Zhao, GD,et al."The role of boron in modifying the solidification and microstructure of nickel-base alloy U720Li".JOURNAL OF ALLOYS AND COMPOUNDS 686(2016):194-203.
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