Growth restriction effects during solidification of aluminium alloys |
| |
Authors: | CHEN Zhong-wei HE Zhi JIE Wan-qi |
| |
Affiliation: | State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi''an 710072, China |
| |
Abstract: | The effects of solute elements during solidification on the grain size are very important and can be quantified by the growth-restriction parameter Q, and Q possesses the better correlation with the grain size. Based on the constitutional undercooling generated by the growth of an adjacent grain during the initial solidification, the growth-restriction parameter Q is deduced and a comprehensive physical basis of Q is obtained by using an initial solute distributing equation. For the alloys with more potent nucleants, Q is a suitable predictor of the grain size. For less potent nucleants, the relative grain size(RGS) is a more accurate prediction of the grain size. This prediction coincides with the experimental behaviors for Al-Ti and Al-Cu alloys with lower solute content. |
| |
Keywords: | growth restriction constitutional undercooling solidification aluminium alloys |
本文献已被 维普 万方数据 ScienceDirect 等数据库收录! |