Modification of titanium net-shape product microstructures for property optimization. [Ti-6Al-4V]

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5311333

Eylon, D; Vogt, R G; Froes, F H ^[1]

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1. Metcut-Materials Research Group, Wright-Patterson AFB, OH (USA)

Modification of the microstructure of net-shape titanium alloy cast and powder metallurgy parts is limited since the material is not worked. However, for improvement of properties such as fatigue crack initiation resistance and ductility, it is necessary to modify the high aspect ratio alpha morphology which occurs in these products. The objective of this work was to evaluate heat treatment and thermochemical treatment approaches, which can significantly modify the structure of Ti-6Al-4V castings and PM compacts without deformation. In both approaches, the treatments resulted in improved fatigue strength. In some cases the fatigue strength of the treated products was even higher than ingot metallurgy (cast and wrought) products. The details of the processes with the resulting microstructures and properties are discussed.

• OSTI ID: 5311333
• Report Number(s): CONF-840909--
• Conference Information: Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Journal Volume: 56
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
ALUMINIUM ALLOYS
CRACKS
CRYSTAL STRUCTURE
DEFORMATION
DUCTILITY
FATIGUE
HEAT TREATMENTS
MECHANICAL PROPERTIES
METALLURGY
MICROSTRUCTURE
MODIFICATIONS
MORPHOLOGY
OPTIMIZATION
POWDER METALLURGY
TENSILE PROPERTIES
THERMOCHEMICAL PROCESSES
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
VANADIUM ALLOYS