Grain Refinement and Superplasticity of Reaction Sintered TiC Dispersed Ti Alloy Composites Using Hydrogenation Treatment

Machida, Naoya; Funami, Kunio; Kobayashi, Masaru

doi:10.4028/www.scientific.net/msf.357-359.539

Cited by 3 publications

(3 citation statements)

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“…With the hydrogen present, 100% compaction was achieved by vacuum hot pressing at 800-850uC for 30 min, compared to the 3 h vacuum hot pressing at 950uC required in the non-hydrogen containing samples. 66,67 An increase of over 14% in both the room temperature tensile strength and elongation of Ti-6Al-4V reinforced with TiC after THP treatment has been reported by Machida et al 68 Thermohydrogen processing also resulted in an improvement in the wear resistance and superplastic forming of the metal matrix composite. 68…”

Section: Metal Matrix Compositesmentioning

confidence: 86%

“…66,67 An increase of over 14% in both the room temperature tensile strength and elongation of Ti-6Al-4V reinforced with TiC after THP treatment has been reported by Machida et al 68 Thermohydrogen processing also resulted in an improvement in the wear resistance and superplastic forming of the metal matrix composite. 68…”

Section: Metal Matrix Compositesmentioning

confidence: 86%

“…65 Hydrogen assisted cleaning and diffusion bonding of the metal surfaces can be used in the processing of powder metallurgy products and composites. [66][67][68] Hydrogen induced enhanced processability…”

Section: Basic Principles Of Thpmentioning

confidence: 99%

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Hydrogen as a temporary alloying element in titanium alloys: thermohydrogen processing

Froes¹,

Senkov²,

Qazi³

2004

International Materials Reviews

217

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Thermohydrogen processing is a technique in which hydrogen is used as a temporary alloying element in titanium alloys to control the microstructure and improve the final mechanical properties. Thermohydrogen processing can also be used to enhance the processability/ fabricability of titanium products including sintering, compaction, machining, and hot working (forging, rolling, superplastic forming, etc.). In the case of near net shapes, such as castings and powder metallurgy products, thermohydrogen processing is the only method available for significant microstructural modifications and consequent enhancement in mechanical properties. This paper reviews the status of the methods and applications of thermohydrogen processing to titanium alloys. Principles of thermohydrogen processing, based on the hydrogen induced alterations of the phase compositions and the kinetics of phase reactions in hydrogenated titanium alloys, are overviewed. Stable and metastable phase diagrams of several titanium alloys containing hydrogen are also reviewed. Different applications of thermohydrogen processing for titanium alloys, such as processing, forming, microstructural modifications and improvement in mechanical properties are also discussed.

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Section: Metal Matrix Compositesmentioning

confidence: 86%