Grain Refinement of Titanium Weld by Heterogeneous Nucleation

Hidenori Terasaki; Yuichi Komizo; Fumihiro Nishino; Masahiko Ikeda

doi:10.4028/www.scientific.net/MSF.580-582.21

Paper Titles

Effect of Hydrogen Concentration at Overlay / Base Metal Interface on Repair Weldability of Petroleum Pressure Vessel
p.5

Microstructural Evolution in 304 Austenitic Stainless Steel during Friction Stir Welding
p.9

Effect of Weld Metal Microstructure on Cold Crack Susceptibility of High Strength Weld
p.13

Influence of Heat Input on Mechanical Properties of Multipass Low-Alloy Steel Weld Metal
p.17

Grain Refinement of Titanium Weld by Heterogeneous Nucleation
p.21

Comprehensive Analysis for Microstructure Evolution in Welding
p.25

Effect of Post Weld Heat Treatment on the Interface Microstructure of Explosively Welded Titanium/Stainless Steel Composite Clad
p.29

Observation of Nucleation and Growth of Acicular Ferrite in HSLA Steel Weld-Metal
p.33

Analysis of Weld Defects in Offshore Structural H Beams
p.37

HomeMaterials Science ForumMaterials Science Forum Vols. 580-582Grain Refinement of Titanium Weld by Heterogeneous...

Grain Refinement of Titanium Weld by Heterogeneous Nucleation

Abstract:

Microstructure formation of CP-Ti and TiB reinforced titanium were in-situ observed during the thermal cycle simulated for Tungsten Inert Gas (TIG) welding, by using laser scanning confocal microscopy. Under the in-situ observation of TiB reinforced titanium, heterogeneous nucleation of α-phase at inclusion was clearly detected and plate growth was shown in high timeresolution. Furthermore, it was observed that grain boundary of β -phase was pinned by the inclusions. Microstructure difference between pure and TiB reinforced titanium was explained based on those in-situ observations.