Strengthening mechanism of friction stir processed and post heat treated NiAl bronze alloy: Effect of rotation rates

Lv, Ying; Ding, Yang; Han, Yuanfei; Zhang, Lai-Chang; Wang, Liqiang; Lü, Weijie

doi:10.1016/j.msea.2016.12.050

Cited by 54 publications

(11 citation statements)

References 44 publications

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“…Microstructure observation results indicate that the grain size of the β phase region significantly increases with an increasing rotation rate (i.e., the plastic deformation) after adding Zn into the TC4 alloy. This is contrary to well-established knowledge in plastic deformation processing, which asserts that the grain size of alloys decreases with increasing plastic deformation [16,38,39]. As reported in many investigations, the grain growth behavior of titanium alloys mainly involves grain boundary migration controlled by atom diffusion [40,41].…”

Section: Discussionmentioning

confidence: 79%

Gradient Microstructures and Mechanical Properties of Ti-6Al-4V/Zn Composite Prepared by Friction Stir Processing

Ding

Sun

et al. 2019

Materials

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In this work, a biomedical Ti-6Al-4V (TC4)/Zn composite with gradient microstructures was successfully prepared by friction stir processing (FSP). The microstructures and mechanical properties of the composite were systematically studied using scanning electron microscope (SEM), X-ray diffractometer (XRD), transmission electron microscope (TEM), atom probe tomography (APT), and microhardness test. The results show that TC4/Zn composite can be successfully prepared, and gradient microstructures varying from coarse grain to nanocrystalline is formed from the bottom to the upper surface. During FSP, adding Zn can accelerate the growth of β phase region, and the grain size significantly increases with the increasing rotation rate. The grain combination is the main mechanism for grain growth of β phase region. The deformation mechanisms gradually change from dislocation accumulations and rearrangement to dynamic recrystallization from the bottom to the upper surface (1.5 mm–150 μm from the upper surface). The composite exhibits slightly higher microhardness compared with the matrix. This paper provides a new method to obtain a TC4/Zn composite with gradient surface microstructures for potential applications in the biomedical field.

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Section: Discussionmentioning

confidence: 79%

Gradient Microstructures and Mechanical Properties of Ti-6Al-4V/Zn Composite Prepared by Friction Stir Processing

Ding

Sun

et al. 2019

Materials

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“…Although Ti alloy has high specific strength and high corrosion resistance, their wear resistance is not desirable . Surface modification techniques including physical deposition methods (such as ion implantation, laser cladding, physical vapor deposition, and plasma spray coating), thermochemical surface treatments (such as nitriding, carburization, oxygen diffusion hardening, and boriding), and surface severe plastic deformation (such as friction stir processing and surface mechanical attrition treatment) have been employed to improve the surface properties of Ti alloys. TiN and diamond‐like carbon (DLC) coatings are commonly used in both physical deposition methods and thermochemical surface treatments.…”

Section: Surface Modification Of Ti Alloys For Biomedical Applicationsmentioning

confidence: 99%

A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

2019

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Compared with stainless steel and Co-Cr-based alloys, Ti and its alloys are widely used as biomedical implants due to many fascinating properties, such as superior mechanical properties, strong corrosion resistance, and excellent biocompatibility. After briefly introducing several most commonly used biomedical materials, this article reviews the recent development in Ti alloys and their biomedical applications, especially the low-modulus β-type Ti alloys and their design methods. This review also systemically investigates the recently attractive progress in preparation of biomedical Ti alloys, including additive manufacturing, porous powder metallurgy, and severe plastic deformation, applied in the manufacturing and the influenced microstructures and properties. Nevertheless, there are still some problems with the long-term performance of Ti alloys, and therefore several surface modification methods are reviewed to further improve their biological activity, wear resistance, and corrosion resistance. Finally, the biocompatibility of Ti and its alloys is concluded. Summarizing the findings from literature, future prediction is also conducted. Darmstadt. His current research interest is focusing on the metal additive manufacturing (e.g. selective laser melting, electron beam melting), titanium alloys and composites, and processing-microstructure-properties in high-performance materials.

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“…Also, precipitates in the form of kappa (κi-iv) phases usually occur in the alloy system [ 5 ]. Each of the precipitates can be differentiated by their location, morphology and dispersion in the microstructure of the alloy, and their presence can influence the fatigue, mechanical and corrosion behaviours of the alloy [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Nondestructive measurement of the mechanical properties of graphene nanoplatelets reinforced nickel aluminium bronze composites

Okoro

Lephuthing

Rasiwela

et al. 2021

Heliyon

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Nanoindentation is a viable method to assess the mechanical properties of developed alloys and composites at the nanometer scale without hampering the microstructure and integrity of materials. In this study, nondestructive measurement was conducted on spark plasma sintered nickel aluminium bronze (NAB), and graphene nanoplatelets (1, 2, 3 wt.%) reinforced NAB composites using the nanoindentation technique. The nondestructive measurements were conducted under loads of 50 mN and 100 mN to assess the nanohardness and reduced elastic modulus of the fabricated NAB alloy and composites. Further investigations were carried to evaluate the elastic recovery index, plasticity index, the nanohardness and reduced modulus ratio, and the yield pressure to reveal the nanomechanical responses of the fabricated materials. Scanning electron microscopy was used to analyze and reveal the dispersibility of the graphene nanoplatelets (GNP) in the NAB matrix. The nondestructive measurements showed that the nanohardness, reduced elastic modulus, yield pressure, resistance to elastic strain to failure and the elastic recovery index improved with the presence and increase in the concentration of GNP in the NAB matrix. The reduced elastic modulus and nanohardness values range from 34.2 – 43.0 GPa and 4407.2–6598.8 MPa respectively, which declined with nanoindentation loads. The fabricated NAB alloy experienced the maximum plastic deformation and least resistance to impact loading.

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Strengthening mechanism of friction stir processed and post heat treated NiAl bronze alloy: Effect of rotation rates

Cited by 54 publications

References 44 publications

Gradient Microstructures and Mechanical Properties of Ti-6Al-4V/Zn Composite Prepared by Friction Stir Processing

Gradient Microstructures and Mechanical Properties of Ti-6Al-4V/Zn Composite Prepared by Friction Stir Processing

A Review on Biomedical Titanium Alloys: Recent Progress and Prospect

Nondestructive measurement of the mechanical properties of graphene nanoplatelets reinforced nickel aluminium bronze composites

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