Crystallographic study of Al3Zr and Al3Nb as grain refiners for Al alloys

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2014-07-01 DOI:10.1016/S1003-6326(14)63309-4

Feng WANG , Dong QIU , Zhi-lin LIU , John TAYLOR , Mark EASTON , Ming-xing ZHANG

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引用次数: 39

Abstract

The potency of Al₃Zr and Al₃Nb as grain refiners for Al alloys was investigated from a crystallographic point of view using the edge-to-edge matching (E2EM) model. The results show that both Al₃Zr and Al₃Nb have small values of interatomic spacing misfit and interplanar spacing mismatch with respect to Al. Furthermore, energetically favourable orientation relationships predicted by the model exist between Al and each of these two intermetallic phases. In the light of the edge-to-edge matching model predictions, it is suggested that both Al₃Zr and Al₃Nb are potent heterogeneous nucleation refiners for Al grains from the crystallographic point of view. The present crystallographic analysis provides a more reasonable explanation for the significant grain refinement obtained in the peritectic Al-Zr and Al-Nb alloys and also provides fresh insight into the understanding of the grain refinement mechanism of Al alloys.

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Al3Zr和Al3Nb作为Al合金晶粒细化剂的结晶学研究

采用边缘匹配(E2EM)模型，从晶体学的角度研究了Al3Zr和Al3Nb作为Al合金晶粒细化剂的效能。结果表明，Al3Zr和Al3Nb相对于Al具有较小的原子间间距失配和面间间距失配值。此外，该模型预测的Al与这两种金属间相之间存在能量有利的取向关系。根据边对边匹配模型预测，从晶体学的角度来看，Al3Zr和Al3Nb都是Al晶粒的非均相成核细化剂。本文的结晶学分析为包晶Al- zr和Al- nb合金的晶粒细化提供了更合理的解释，也为了解Al合金的晶粒细化机理提供了新的思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.