Superplastic forming is an effective way to manufacture complex-shaped parts of titanium-based alloys. This paper studies the influence initial microstructure and its strain-induced evolution on superplastic deformation behavior formability a alloy. Two types Ti–Al–V–Mo alloy samples having different fraction recrystallized grains before start were studied. The behavior, including strain harden...

The objective of this project is the development of a multi-scale simulation tool for designing thermo-mechanical processes to achieve control of microstructure-sensitive properties in materials used in applications of interest to the U.S. Army. As a part of continuing research effort, developments in the year 2004-05 are presented. An efficient large strain homogenization tool has been develop...

The effect of secondary steelmaking processes such as desulphurization, removal of inclusions and vacuum degassing followed by hot forging and hardening heat treatment on the microstructure and mechanical properties of a hot-work w500 tool steel have been studied in details. In order to follow the progress of secondary steel making, the content of impurity elements such as S, P, O, H and N were...

modern vehicle bodies make intensive use of high strength steel grades to meet the contradicting demand of lighter weight and simultaneously better mechanical performance. for many steel grades microalloying by niobium is the key to achieve their characteristic property profile. in hsla steels niobium enhances the strength primarily by grain refinement. in interstitial free high strength steels...

By coarsening of the ?’-precipitates and selective extraction one two existing phases, porous structures can be produced from nickel-based superalloys. There are basic approaches to achieve a bicontinuous ?/?’-microstructure—directional incoherent coarsening. Single crystalline superalloy membranes by so-called rafting microstructure, i.e., directional Unlike this process, incoherently coarsene...