Premium
Microstructure Evolution and Mechanical Properties of Linear Friction Welded Ti‐5Al‐2Sn‐2Zr‐4Mo‐4Cr (Ti17) Titanium Alloy Joints
Author(s) -
Li WenYa,
Ma Tiejun,
Yang Siqian
Publication year - 2010
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.200900185
Subject(s) - materials science , microstructure , titanium alloy , ultimate tensile strength , welding , indentation hardness , toughness , alloy , composite material , deformation (meteorology) , plasticity , titanium , metallurgy
The microstructural evolution, microhardness, tensile properties and impact toughness of Ti‐5Al‐2Sn‐2Zr‐4Mo‐4Cr (Ti17) alloy joints welded by linear friction welding (LFW) are investigated. A narrow, sound weld is formed, consisting of a superfine α + β structure in the weld center. The structure gradually changes from the weld center to the parent Ti17 in the TMAZ, with the highly deformed α and β phases oriented along the deformation direction, owing to the uneven deformation and temperature distribution. The microhardness of the TMAZ is the lowest of the distinct zones and presents a valley‐like shape. The tensile strengths of the joints are comparable to that of the parent Ti17 but with a much lower plasticity and impact toughness. The microstructure variation contributes to the resultant properties.