基体相中细小W颗粒对重钨合金力学性能的影响

Q3 Engineering

Journal of Applied Research and Technology Pub Date : 2022-08-31 DOI:10.22201/icat.24486736e.2022.20.4.1357

A. Kumari, R. Sarkar, A. Panchal, G. Prabhu, T. K. Nandy

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引用次数: 2

摘要

采用液相烧结+热机械加工法制备90W-7Ni-3Co (WNC)和89.6W-6.2Ni-1.8Fe-2.4Co (WNFC)钨质重合金，对其组织和力学性能进行了研究。经循环热处理的90W-7Ni-3Co合金在基体中呈现出细小的钨颗粒。当合金在850℃(循环热处理的较低温度)下热处理时，在基体中形成富W的金属间相，随后在高温(1150℃)固溶处理时溶解，留下细小的W颗粒。另一方面，合金的基体相89.6W-6.2Ni-1.8Fe-2.4Co组织清晰，无此类析出物。这两种合金都进行了热机械处理，包括两阶段挤压和中间热处理。90W-7Ni-3Co合金的强度优于89.6W-6.2Ni-1.8Fe-2.4Co合金，但断裂伸长率和冲击韧性较低。为了阐明强化W的溶解和(在基体中)细小W析出物对所研究合金力学行为的影响，进行了显微组织-性能对比。

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The effect of fine W particles in matrix phase on mechanical properties of tungsten heavy alloys

Tungsten heavy alloys 90W-7Ni-3Co (WNC) and 89.6W-6.2Ni-1.8Fe-2.4Co (WNFC), produced using liquid phase sintering followed by thermo-mechanical processing, were investigated for microstructure and mechanical properties. 90W-7Ni-3Co alloy processed following a cyclic heat treatment showed fine tungsten particles in the matrix. The alloy, when heat treated at a temperature 850°C (the lower temperature of cyclic treatment), formed a W-rich intermetallic phase in the matrix that subsequently dissolved during high temperature (1150°C) solution treatment leaving behind fine W particles. On the other hand, the matrix phase of the alloy, 89.6W-6.2Ni-1.8Fe-2.4Co showed a clean structure devoid of any such precipitates. Both the alloys were subjected to a thermomechanical treatment that included two stage swaging with intermediate heat treatments. 90W-7Ni-3Co alloy exhibited superior strength, but lower elongation to failure and impact toughness as compared to 89.6W-6.2Ni-1.8Fe-2.4Co alloy. Microstructure-property correlation was undertaken in order to elucidate the effect of enhanced W dissolution and fine W precipitates (in the matrix) on mechanical behaviour of the alloys investigated.

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来源期刊

Journal of Applied Research and Technology 工程技术-工程：电子与电气

CiteScore

1.50

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： The Journal of Applied Research and Technology (JART) is a bimonthly open access journal that publishes papers on innovative applications, development of new technologies and efficient solutions in engineering, computing and scientific research. JART publishes manuscripts describing original research, with significant results based on experimental, theoretical and numerical work. The journal does not charge for submission, processing, publication of manuscripts or for color reproduction of photographs. JART classifies research into the following main fields: -Material Science: Biomaterials, carbon, ceramics, composite, metals, polymers, thin films, functional materials and semiconductors. -Computer Science: Computer graphics and visualization, programming, human-computer interaction, neural networks, image processing and software engineering. -Industrial Engineering: Operations research, systems engineering, management science, complex systems and cybernetics applications and information technologies -Electronic Engineering: Solid-state physics, radio engineering, telecommunications, control systems, signal processing, power electronics, electronic devices and circuits and automation. -Instrumentation engineering and science: Measurement devices (pressure, temperature, flow, voltage, frequency etc.), precision engineering, medical devices, instrumentation for education (devices and software), sensor technology, mechatronics and robotics.