The Effects of Friction Stir Processing on the Microstructural Evolution and Mechanical Properties of Ti-6A1-4V Alloy

Abstract

Friction stir processing (FSP) was applied to Ti-6A1-4V alloy to modify the microstructure and improve the mechanical properties. Experiments were carried out at three different tool rotational rates: 1200, 1000, and 800 rpm. Other parameters were kept constant. the material processed at 800 rpm showed a very narrow HAZ. Hardness in the nugget region was higher than the parent material in each case. the sample processed at 1200 rpm showed an improvement of approximately 31% in YS and UTS over as-received material was observed. There was an improvement of 33% and 27% respectively in the samples processed at 1000 rpm and 800 rpm. the greatest improvement in strength after FSP was 1234 MPa, compared to 923 MPa in as-received material. This improvement was observed with no compromise in the ductility of the material (24% elongation for parent and 22-26% elongation for FSPed samples).

Department(s)

Materials Science and Engineering

Keywords and Phrases

Friction stir processing; Mechanical property; Microhardness; Microstructure; Ti-6A1-4V

International Standard Book Number (ISBN)

978-087339737-7

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 The Minerals, Metals & Materials Society, All rights reserved.

Publication Date

01 Apr 2009

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