Effect of Al-5Ti-1B grain refiner on the microstructure, mechanical properties and acoustic emission characteristics of Al5052 aluminium alloy

被引：42
|
作者：
Pattnaik, Amulya Bihari [1 ]
Das, Satyabrat [1 ]
Jha, Bharat Bhushan [2 ]
Prasanth, Nedumbilly [1 ]
机构：
[1] CSIR Adv Mat & Proc Res Inst, Light Weight Metall Mat Grp, Bhopal, Madhya Pradesh, India
[2] CSIR Inst Minerals & Mat Technol, Surface Engn Dept, Bhubaneswar, Orissa, India
来源：
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2015年 / 4卷 / 02期
关键词：
Microstructure; Tensile strength; Grain refinement; Mechanical properties; Acoustic emission;
D O I：
10.1016/j.jmrt.2014.10.017
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present investigation, the effect of Al-5Ti-1B grain refiner on the microstructure, mechanical properties and acoustic emission characteristics of Al 5052 aluminium alloy have been studied. Microstructural analysis showed the presence of primary a solid solution. No Al-Mg phase was found to be formed due to the presence of magnesium in the solid solution. The results indicated that the addition of Al-5Ti-1B grain refiner into the alloy caused a significant improvement in ultimate tensile strength (UTS) and elongation values from 114 MPa and 7.8% to 185 MPa and 18% respectively. The main mechanisms behind this improvement were found to be due to the grain refinement during solidification and segregation of Ti at primary a grain boundaries. Acoustic emission (AE) results indicated that intensity of AE signals increased with increase in Al-5Ti-1B master alloy content, which had been attributed to the combined effect of dislocation motion and grain refinement. The field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX) analysis were used to study the microstructure and fracture surfaces of the samples. (C) 2014 Brazilian Metallurgical, Materials and Mining Association. Published by Elsevier Editora Ltda. All rights reserved.
引用
收藏
页码：171 / 179
页数：9
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