Comparison of Blended Elemental (BE) and Mechanical Alloyed (MA) Powder Compact Forging into Ti-6Al-4V Rocker Arms

Ming Tu Jia; De Liang Zhang; Brian Gabbitas

doi:10.4028/www.scientific.net/KEM.520.82

Paper Titles

Scandium (Sc) Behavior in High Temperature Ti Alloys
p.57

Modification of Sintered Titanium Alloys by Hot Isostatic Pressing
p.63

Preparation, Microstructure and Properties of Ti-6Al-4V Rods by Powder Compact Extrusion of Powder Mixture
p.70

Porous Ti-6Al-4V Alloy Prepared by a Press-and-Sinter Process
p.76

Comparison of Blended Elemental (BE) and Mechanical Alloyed (MA) Powder Compact Forging into Ti-6Al-4V Rocker Arms
p.82

Enhanced Sintering of Pre-Alloyed Binary TiAl Powder by a Small Addition of Iron
p.89

Titanium Powder from the TiRO™ Process
p.95

Fundamental Reactor Design Considerations for Reducing TiCl₄ Metallothermically to Produce Ti Powder
p.101

A Novel Process for Making Spherical Powders of High Nb Containing TiAl Alloys
p.111

HomeKey Engineering MaterialsKey Engineering Materials Vol. 520Comparison of Blended Elemental (BE) and...

Comparison of Blended Elemental (BE) and Mechanical Alloyed (MA) Powder Compact Forging into Ti-6Al-4V Rocker Arms

Abstract:

Ti-6Al-4V rocker arms for internal combustion engines were produced by forging of compacts of blended powder consisting of elemental hydride-dehydride (HDH) titanium powder and Al60V40 (wt%) master alloy powder or mechanical alloyed (MA) powder synthesized by high energy mechanical milling of a mixture of HDH titanium and Al60V40 master alloy powders. The powder compacts were made by warm compaction, and their relative density was 90%. The mechanical properties and microstructures of as-forged parts made using blended powder were improved significantly with increasing holding time at forging temperature, and close to those of as-forged parts produced by powder compact forging of HDH Ti-6Al-4V pre-alloyed powder. However, the as-forged part produced by powder compact forging of MA powder was brittle, and fractured prematurely during tensile testing.