Ti-based bulk metallic glass matrix composites with in situ precipitated β-Ti phase fabricated by spark plasma sintering

Chen, Y.; Chao, Yang; Zou, Liming; Qu, Shengguan; Li, X.Q.; Li, Y.Y.

doi:10.1016/j.jnoncrysol.2012.09.028

Cited by 18 publications

(4 citation statements)

References 23 publications

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“…The mechanical properties of these alloys reported in this work are also better than those of the fabricated alloys in previous work [6,18,[25][26].…”

Section: Mechanical Behavior Of Sced Bulk Alloyssupporting

confidence: 44%

Equiaxed Ti-based composites with high strength and large plasticity prepared by sintering and crystallizing amorphous powder

Liu

Chao

Kang

et al. 2016

Materials Science and Engineering: A

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High-performance titanium alloys with an equiaxed composite microstructure were achieved by sintering and crystallizing amorphous powder. By introducing a second phase in a β-Ti matrix, series of optimized Ti-Nb-Fe-CoAl and Ti-Nb-Cu-Ni-Al composites, which have a microstructure composed of ultrafine-grained and equiaxed CoTi 2 or (Cu,Ni)Ti 2 precipitated phases surrounded by a ductile β-Ti matrix, were fabricated by sintering and crystallizing mechanically alloyed amorphous powder. The as-fabricated composites exhibit ultra-high ultimate compressive strength of 2585 MPa and extremely large compressive plastic strain of around 40%, which are greater than the corresponding ones for most titanium alloys. In contrast, the alloy fabricated by sintering and crystallizing Ti-Zr-Cu-Ni-Al amorphous powder, which possesses significantly higher glass forming ability in comparison with the Ti-Nb-Fe-CoAl and Ti-Nb-Cu-Ni-Al alloy systems, exhibits a complex microstructure with several intermetallic compounds and a typical brittle fracture feature. The deformation behavior and fracture mechanism indicate that the ultrahigh compressive strength and large plasticity of the as-fabricated equiaxed composites is induced by dislocations pinning effect of the CoTi 2 or (Cu,Ni)Ti 2 second phases and the interaction and 2 multiplication of generated shear bands in the ductile β-Ti matrix, respectively. The results obtained provide basis guidelines for designing and fabricating titanium alloys with excellent mechanical properties by powder metallurgy.

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“…The mechanical properties of these alloys reported in this work are also better than those of the fabricated alloys in previous work [6,18,[25][26].…”

Section: Mechanical Behavior Of Sced Bulk Alloyssupporting

confidence: 44%

Equiaxed Ti-based composites with high strength and large plasticity prepared by sintering and crystallizing amorphous powder

Liu

Chao

Kang

et al. 2016

Materials Science and Engineering: A

Self Cite

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“…Moreover, tailored microstructure could be obtained by controlling sintering and crystallizing of amorphous titanium alloy powder . Several studies achieved fine and ultrafine equiaxed grained composite microstructure showing enhanced mechanical properties …”

Section: Challenges For Pm Titaniummentioning

confidence: 99%

Powder Metallurgy Strategies to Improve Properties and Processing of Titanium Alloys: A Review

et al. 2017

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Powder metallurgy (PM) is an attractive technology for manufacturing net-shape titanium-based components. However, it is challenging to make PM titanium products competitive in terms of mechanical properties. This article gives an overview of the current challenges in PM titanium and the best strategies to overcome them by alloying. By adding suitable alloying elements the properties of PM titanium components can be enhanced. The use of sintering aids helps to control the typical residual porosity of PM titanium alloys. Furthermore, controlling microstructure by alloying offers the possibility to go for high performance applications. Moreover, ductility is improved by adding elements that scavenge oxygen. A favorable selection of alloying elements offers a practical and competitive approach to meet the mechanical requirements in future PM titanium applications.

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“…The supercooled liquid region ΔTx is 43 K, which is similar to the rapid solidification of Cu60Zr30Ti10 BMG (i.e., ΔTx = 42 K [22], 45 K [23]). As the ΔTx is known as one of indices of glass forming ability (GFA) [24], it can be said the alloy has very high glass forming ability. The powder milled for 5 h was consolidated into a disk by using a vacuum hot press operated at 746 K for 30 min under pressures of 0.72, 0.96, and 1.20 GPa.…”

Section: Ball-milled Powder and Consolidated Bmgmentioning

confidence: 99%

Formation and Corrosion Behavior of Mechanically-Alloyed Cu–Zr–Ti Bulk Metallic Glasses

Lee

Cheng

Chen

et al. 2017

Metals

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Cu 60 Zr 30 Ti 10 metallic glass powder was prepared by mechanically alloying a mixture of pure Cu, Zr, and Ti powders after 5 h of milling. Cu 60 Zr 30 Ti 10 bulk metallic glass (BMG) was synthesized by vacuum hot pressing the as-milled Cu 60 Zr 30 Ti 10 metallic glass powder at 746 K in the pressure range of 0.72-1.20 GPa, and the structure was analyzed through X-ray diffraction and transmission electron microscopy. The pressure could enhance the thermal stability, and prolong the existence, of the amorphous phase inside the Cu 60 Zr 30 Ti 10 powder. Furthermore, the corrosion behavior of the Cu-based BMG in four corrosive media was studied using a potentiodynamic method. The Cu 60 Zr 30 Ti 10 BMG exhibited a low corrosion rate and current density in 1 N solutions of H 2 SO 4 , NaOH, and HNO 3 . X-ray photoelectron spectroscopy results revealed that the formation of Zrand Ti-rich passive oxide layers provides a high corrosion resistance against 1 N H 2 SO 4 and HNO 3 solutions, and the breakdown of the protective film by Cl − attack was responsible for pitting corrosion in a 3 wt % NaCl solution. The formation of oxide films and the nucleation and growth of pitting were analyzed through microstructural investigations.

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Ti-based bulk metallic glass matrix composites with in situ precipitated β-Ti phase fabricated by spark plasma sintering

Cited by 18 publications

References 23 publications

Equiaxed Ti-based composites with high strength and large plasticity prepared by sintering and crystallizing amorphous powder

Equiaxed Ti-based composites with high strength and large plasticity prepared by sintering and crystallizing amorphous powder

Powder Metallurgy Strategies to Improve Properties and Processing of Titanium Alloys: A Review

Formation and Corrosion Behavior of Mechanically-Alloyed Cu–Zr–Ti Bulk Metallic Glasses

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