Sliding wear behaviour of two gamma-based titanium aluminides

Rastkar, Ahmad Reza; Bloyce, A.; Bell, T.

doi:10.1016/s0043-1648(00)00334-3

Cited by 75 publications

(42 citation statements)

References 9 publications

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“…However, several investigations [3][4][5] indicate that TA have poor friction and wear performance under extreme conditions of load, sliding speed, temperature and reversed thermal cycling environments, which has limited their applications. One of common methods of improving the friction and wear behavior of TA involves the uses of fillers in the past decades.…”

Section: Introductionmentioning

confidence: 99%

Preparation and tribological properties of TiAl matrix composites reinforced by multilayer graphene

Shi

Zhai

et al. 2014

Carbon

202

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Section: Introductionmentioning

confidence: 99%

Preparation and tribological properties of TiAl matrix composites reinforced by multilayer graphene

Shi

Zhai

et al. 2014

Carbon

202

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“…The etching solution used for microstructural observation contained 2 % HF and 13 % HNO 3 . Measurement of microhardness distribution profile in the subsurface region of the specimen was conducted using a micro Vickers hardness tester (Akashi Corp., HM-102) with a load of 10 g. Surface hardening was evaluated by the maximum surface hardness and hardening layer depth that was the distance from the surface to the location with hardness value showing the same one with the base material.…”

Section: Methodsmentioning

confidence: 99%

“…In application of titanium alloys to sliding or rotating parts of automobile or machinery, severe adhesive wear or fretting wear occurs. [1][2][3] As an example, engine valves made by titanium alloys cause severe fretting or abrasion wear against a valve sheet, and thus any surface hardening treatment on titanium alloys is needed for prevention of abrasion. 4,5) In a medical hip-joint application, a semi-spherical head of the artificial bone head made of titanium alloys tends to yield debris due to sliding wear with a cap made of high density plastics.…”

Section: Introductionmentioning

confidence: 99%

Surface Hardening Treatment for C.P. Titanium and Titanium Alloys in Use of Ar–5%CO Gas

et al. 2006

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Surface hardening of C.P. (commercially pure) titanium and titanium alloys in use of Ar-5%CO gas was investigated in the temperature range between 973 K and 1 123 K. Titanium materials used were aϩb type alloy of Ti-4.5%Al-3%V-2%Mo-2%Fe (SP-700) and b type alloy of Ti-15%V-3%Cr-3%Sn-3%Al . Oxidation accompanied with surface hardening in use of Ar-5%CO gas is much reduced compared with that of Ar-20%CO 2 gas. Surface hardening was evaluated by both of the maximum surface hardness and hardening layer depth obtained from hardness distribution profiles in the subsurface region. The former is the highest in C.P. titanium and the lowest in Ti-15-333 alloy, and the latter is the deepest in Ti-15-333 alloy and the shallowest in C.P. titanium. Surface hardening in C.P. titanium is caused by solid solution hardening of oxygen and carbon enriched in the subsurface region. Enrichment of these interstitials in the subsurface region of SP-700 or Ti-15-333 alloys causes the increase of a volume fraction in aϩb two phases or phase transformation from b to aϩb two phases, respectively, and surface hardening is primarily controlled by volume fraction of a phase hardened by interstitials enrichment. The other b type titanium alloy of Ti-15%Mo-5%Zr-3%Al yields much marked surface hardening over Ti-15-333 alloy. All of these results were analyzed and discussed based on oxygen and carbon concentration profiles, which were obtained by EPMA, and were also calculated by uni-dimensional diffusion model. KEY WORDS: C.P. titanium; SP-700 alloy; Ti-15V-3Cr-3Sn-3Al alloy; surface hardening; CO gas; CO 2 gas; oxidation; maximum surface hardness; hardening layer depth.

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“…[23,24] In such applications, tribological and corrosion properties are extremely important. Therefore, several attempts have been made to improve and evaluate their tribological properties [25][26][27][28][29][30] Similarly, as their applications will become broader, these materials might be exposed to variety of corrosive environments, which necessitates development of knowledge related to their corrosion performance. The corrosion behavior of different TiAl compounds has been evaluated in variety of aqueous environments.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of γ‐TiAl: Processing, Microstructure, and Properties

et al. 2016

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Additive manufacturing of g-TiAl intermetallic alloy using laser-engineered net shaping (LENS) is reported. The influence of laser power and scan speed on processability, microstructure, tribological, and electrochemical properties is studied. The results demonstrate that near net shape g-TiAl parts can be fabricated using LENS and defect-free parts are obtained with narrow laser energy input range (40-50 J mm À2 ). The high cooling rates result in massive-like g matrix with small amount of g þ a 2 lamellar. Process parameters strongly influence tribological and electrochemical properties of LENS-processed g-TiAl parts in 3.5% NaCl solution. Wear is of abrasive type with no evidence of corrosion on wear tracks.

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Sliding wear behaviour of two gamma-based titanium aluminides

Cited by 75 publications

References 9 publications

Preparation and tribological properties of TiAl matrix composites reinforced by multilayer graphene

Preparation and tribological properties of TiAl matrix composites reinforced by multilayer graphene

Surface Hardening Treatment for C.P. Titanium and Titanium Alloys in Use of Ar–5%CO Gas

Additive Manufacturing of γ‐TiAl: Processing, Microstructure, and Properties

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