Thermo hydrogen treatment for microstructure refinement and mechanical properties improvement of Ti-6Al-4V alloy

Zong, Yanxu; Wu, Kechen

doi:10.1016/j.msea.2017.07.076

Cited by 30 publications

(6 citation statements)

References 25 publications

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“…As shown in Figure a,d, numerous deformation twins (marked by green arrows) were detected both beneath the surface and inside of pure titanium. However, the precipitation of titanium hydrides would lead to grain segmentation, which equivalently reduces the grain size of the sample . As the propensity of deformation twinning reduces with the decrease in grain size, the introduction of hydrogen precharging process would lead to the decrease in twin activity in pure titanium.…”

Section: Resultsmentioning

confidence: 99%

“…As hydrides basically have no plastic deformation resistance, the hydrogenated alloys were more susceptible to dislocation generation and crack propagation than titanium alloy matrix, resulting in the degradation of plasticity . Recently, the influence of hydrogenation on the microstructure evolution and mechanical performance of titanium alloy has attracted much attention, most of which focused on its effect on high‐temperature mechanical properties, while few studies were dedicated to analyze its effect on mechanical behaviors at room temperature . By comparing the cold rolling behaviors of pure titanium with or without hydrogen precharging, Wen et al.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Hydrogen Precharging on Mechanical and Electrochemical Properties of Pure Titanium

et al. 2020

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The electrolytic hydrogen precharging process is used to analyze the influence of hydrogen on the microstructure, corrosion resistance, and mechanical properties of pure titanium. The results demonstrate that two types of titanium hydrides (δ‐TiHx and ϵ‐TiH2) are detected by electron backscatter diffraction (EBSD), and the volume fraction of titanium hydrides, the local strain caused by hydrogen precipitation, and the thickness of hydrides layer increase with the increase in precharging time. It is noteworthy that the formation of hydrides layer has a protective effect on general corrosion, but the local strain caused by hydrides precipitation leads to the destruction of corrosion resistance, as a result the corrosion resistance of pure titanium increases first and then decreases with the increase in hydrogen precharging time. Moreover, with the precipitation of hydrides, the fracture mode changes from ductile failure to duplex‐ and multimode failure, resulting in the decrease in ultimate tensile strength (UTS) and elongation. Therefore, the mechanical and electrochemical properties of the precharged samples first increase and then decrease with the increase in precharging time, reaching their optimum values at 10 h, and the critical precharging time is determined to be 75 h when comparing those properties with pure titanium.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Hydrogen Precharging on Mechanical and Electrochemical Properties of Pure Titanium

et al. 2020

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“…Nickel-based super alloys are used in the development of aircraft exhaust valves and turbine rotors due to their high creep resistance at higher temperatures [12]. Research has been carried out on improving the microstructure and mechanical properties of stainless-steel alloys [13][14][15][16][17][18][19], aluminum alloys [20][21][22][23][24][25][26], titanium alloys [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41], and nickel-based super alloys [42,43] using different techniques like adding carbides [44][45][46][47], alloying elements [48][49][50][51], and heat treatments [20,21,42]. Conventional fabrication involves multiple processes and is time consuming.…”

Section: Introductionmentioning

confidence: 99%

Recent Advancements in Material Waste Recycling: Conventional, Direct Conversion, and Additive Manufacturing Techniques

Golvaskar,

Ojo,

Kannan

2024

Recycling

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To improve the microstructure and mechanical properties of fundamental materials including aluminum, stainless steel, superalloys, and titanium alloys, traditional manufacturing techniques have for years been utilized in critical sectors including the aerospace and nuclear industries. However, additive manufacturing has become an efficient and effective means for fabricating these materials with superior mechanical attributes, making it easier to develop complex parts with relative ease compared to conventional processes. The waste generated in additive manufacturing processes are usually in the form of powders, while that of conventional processes come in the form of chips. The current study focuses on the features and uses of various typical recycling methods for traditional and additive manufacturing that are presently utilized to recycle material waste from both processes. Additionally, the main factors impacting the microstructural features and density of the chip-unified components are discussed. Moreover, it recommends a novel approach for recycling chips, while improving the process of development, bonding quality of the chips, microstructure, overall mechanical properties, and fostering sustainable and environmentally friendly engineering.

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“…In addition, researches have been studied to draw Ti and Ti alloy-H state diagrams [11,12]. On the other hand, various studies have been conducted to refine the structure of titanium and titanium alloys using hydrogen as a temporary alloying element [13][14][15][16]. As a result, it has been found that hydrogen, such as high temperature formability, can have a positive effect on the mechanical properties of Ti and Ti alloys [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Effect of α-lath size on the mechanical properties of Ti–6Al–4V using core time hydrogen heat treatment

Cho

Kwon

et al. 2020

Materials Science and Technology

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When hydrogen is dissolved, brittleness occurs in the material. However, in the case of titanium and titanium alloy, hydrogen can be temporarily dissolved and removed, thereby improving the mechanical properties of titanium and titanium alloy. In this study, Core time Hydrogen Heat treatment (CHH) applies to Ti–6Al–4V alloy to improve mechanical properties. CHH was performed at 800°C and 1000°C for 2 h. Thereafter, dehydrogenation was performed for 2 h at 700°C in vacuum atmosphere to remove residual hydrogen. After the CHH at 800°C, it was found that the α-lath size in the Ti–6Al–4V was narrowed; thereby increasing the Vickers hardness and tensile strength without decreasing in elongation.

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Thermo hydrogen treatment for microstructure refinement and mechanical properties improvement of Ti-6Al-4V alloy

Cited by 30 publications

References 25 publications

Effect of Hydrogen Precharging on Mechanical and Electrochemical Properties of Pure Titanium

Effect of Hydrogen Precharging on Mechanical and Electrochemical Properties of Pure Titanium

Recent Advancements in Material Waste Recycling: Conventional, Direct Conversion, and Additive Manufacturing Techniques

Effect of α-lath size on the mechanical properties of Ti–6Al–4V using core time hydrogen heat treatment

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