Al-Ni intermetallic composites produced in situ by friction stir processing

被引：147

作者：

Ke, Liming ^{[1
]}

Huang, Chunping ^{[1
,2
]}

Xing, Li ^{[1
]}

Huang, Kehui ^{[1
]}

机构：

[1] Nanchang Hangkong Univ, Natl Def Key Discipline Lab Light Alloy Proc Sci, Nanchang 330063, Peoples R China

[2] NW Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 503卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Friction stir processing; Intermetallics; Al-Ni composites; Heat treatment; MICROSTRUCTURE; NANOCOMPOSITES;

D O I：

10.1016/j.jallcom.2010.05.040

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Bulk Al-Ni intermetallic composites were synthesized in situ by Friction Stir Processing (FSP) at Al alloy plate with Ni powder. The microstructures and compositions of the composites were analyzed, the hardness and tensile properties of intermetallics were measured. Defect-free composites with Al(3)Ni and Al(3)Ni(2) intermetallics were successfully produced by FSP and heat treatment. The initial nickel powder present three states after FSP: the coarse nickel aggregation, the sandwich-structure composite and the micron-sized Al(3)Ni particles. Typical microstructures of Al(3)Ni intermetallics after heat treatment have two microstructures, i.e. the submicron-sized equiaxed crystal when there are fine micron particles uniformly distributed in the aluminum matrix and columnar crystal when Al(3)Ni(2) is surrounded. The grain refinement and the precipitation hardening effect of the Al(3)Ni intermetallics lead to a significant increase of the microhardness and tensile strength of the Al-Ni composites. The aggregated Ni powders have metallurgy reaction during FSP. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：494 / 499

页数：6

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