Premium
Additive Manufacturing of γ‐TiAl: Processing, Microstructure, and Properties
Author(s) -
Balla Vamsi Krishna,
Das Mitun,
Mohammad Ashfaq,
AlAhmari Abdulrahman M.
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500588
Subject(s) - materials science , microstructure , intermetallic , tribology , alloy , abrasive , metallurgy , lamellar structure , laser , lens (geology) , electrochemistry , composite material , optics , electrode , chemistry , physics
Additive manufacturing of γ‐TiAl intermetallic alloy using laser‐engineered net shaping (LENS) is reported. The influence of laser power and scan speed on processability, microstructure, tribological, and electrochemical properties is studied. The results demonstrate that near net shape γ‐TiAl parts can be fabricated using LENS and defect‐free parts are obtained with narrow laser energy input range (40–50 J mm −2 ). The high cooling rates result in massive‐like γ matrix with small amount of γ + α 2 lamellar. Process parameters strongly influence tribological and electrochemical properties of LENS‐processed γ‐TiAl parts in 3.5% NaCl solution. Wear is of abrasive type with no evidence of corrosion on wear tracks.