Solute segregation governed atomistic configuration of β-Mg2Si/α-Al interface in an Al alloy

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2025-07-02 DOI:10.1016/j.scriptamat.2025.116845

Chun Guo , Shiwei Pan , Feng Qian , Chunan Li , Shun Xu , Xingwang Cheng , Yanjun Li

{"title":"Solute segregation governed atomistic configuration of β-Mg2Si/α-Al interface in an Al alloy","authors":"Chun Guo , Shiwei Pan , Feng Qian , Chunan Li , Shun Xu , Xingwang Cheng , Yanjun Li","doi":"10.1016/j.scriptamat.2025.116845","DOIUrl":null,"url":null,"abstract":"<div><div>β-Mg2Si is a common intermetallic phase in commercial Al alloys, which can influence the precipitation of age-hardening phases and mechanical properties. In this work, β-Mg2Si dispersoid formed in a novel multi-components Al-Mg-Zn based crossover alloy during homogenization has been explored in detail. It is found that β-Mg2Si owns a rarely observed cube-cube orientation relationship (OR) of [001]β//[001]Al, (100)β//(100)Al with Al matrix, while a Si-terminated {100} interface layer can be identified. More strikingly, it is revealed that β-Mg2Si/Al-matrix interfaces acted as preferential segregation sites for Zr, Zn and Cu atoms, causing heterogeneous nucleation of Al3Zr and T-(Al,Zn,Cu)49Mg32 phases at the interfaces. Resultantly, the growth of β-Mg2Si could be slowed down with their transition from cube-cube to Kanno OR being hindered. The underlying mechanisms have been revealed by applying first principles calculations of segregation energies of solute atoms based on the atomistic interfacial configuration.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"268 ","pages":"Article 116845"},"PeriodicalIF":5.3000,"publicationDate":"2025-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scripta Materialia","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1359646225003082","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

β-Mg₂Si is a common intermetallic phase in commercial Al alloys, which can influence the precipitation of age-hardening phases and mechanical properties. In this work, β-Mg₂Si dispersoid formed in a novel multi-components Al-Mg-Zn based crossover alloy during homogenization has been explored in detail. It is found that β-Mg₂Si owns a rarely observed cube-cube orientation relationship (OR) of [001]_β//[001]_Al, (100)_β//(100)_Al with Al matrix, while a Si-terminated {100} interface layer can be identified. More strikingly, it is revealed that β-Mg₂Si/Al-matrix interfaces acted as preferential segregation sites for Zr, Zn and Cu atoms, causing heterogeneous nucleation of Al₃Zr and T-(Al,Zn,Cu)₄₉Mg₃₂ phases at the interfaces. Resultantly, the growth of β-Mg₂Si could be slowed down with their transition from cube-cube to Kanno OR being hindered. The underlying mechanisms have been revealed by applying first principles calculations of segregation energies of solute atoms based on the atomistic interfacial configuration.

Abstract Image

查看原文本刊更多论文

溶质偏析控制了铝合金中β-Mg2Si/α-Al界面的原子构型

β-Mg2Si是工业铝合金中常见的金属间相，影响时效硬化相的析出和力学性能。本文详细研究了一种新型多组分Al-Mg-Zn基交叉合金在均匀化过程中形成的β-Mg2Si弥散体。发现β- mg2si具有罕见的[001]β//[001]Al， (100)β//(100)Al与Al基体的立方取向关系（OR），同时可以识别出si端接的{100}界面层。更引人注目的是，β-Mg2Si/Al基体界面是Zr、Zn和Cu原子的优先偏析位点，在界面处形成了Al3Zr和T-(Al,Zn,Cu)49Mg32相的非均相形核。结果，β-Mg2Si的生长速度减慢，阻碍了它们从立方体到Kanno OR的转变。基于原子界面构型，应用第一性原理计算了溶质原子的偏析能，揭示了其潜在的机理。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.