DataVXAdvanced Engineering MaterialsPaper
journal article·2024-03

The Effects of Oscillating Frequency on Microstructure and Hardness of W‐Ni‐Fe Refractory Alloy Sintered by Hot Oscillating Pressure

Ka Gao, Yanghu Hu, Zixiang Zhang, Chunyang Ren, Wei Zhao, Dejian Sun, Yang Gao, Linan An, Qingquan Kong

Advanced Engineering Materials· Volume 26· Issue 6
Publisher page
Source abstract

Abstract

90 W‐7Ni‐3Fe refractory alloys are first sintered by hot oscillating pressure (HOP) under different oscillating frequencies (0, 1, and 10 Hz) in this work. The effects of oscillating frequencies on the microstructure and Vickers hardness are investigated. With the oscillating frequency increasing, the relative density and hardness of refractory alloys are obviously improved. Especially, the alloy sintered at the oscillating frequency of 10 Hz had the highest relative density of approximately 98.9% and the smallest average grain size of 3.26 μm. Moreover, the narrowest average thickness of the bonding phase is about 0.18 μm, and the lowest tungsten contiguity is about 61.1%. Then its excellent hardness (456.8 HV30) is obtained, which is nearly 16.1% higher than that of the 0 Hz frequency alloy. The refractory alloy with high densification, small grain size, and good hardness could be obtained by HOP with a high oscillating frequency.
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Research context

Metals & alloysCeramics & glasses

OpenAlex topics: Advanced materials and composites · Metal and Thin Film Mechanics · Intermetallics and Advanced Alloy Properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Mechanical Engineering University of Shanghai for Science and Technology Shanghai 200093 China

State Key Laboratory of Metal Extrusion and Forging Equipment Technology China National Heavy Machinery Research Institute Co., Ltd. Xi'an 710000 China

Department of General Medicine Changhai Hospital Shanghai 200000 China

School of Materials Science and Engineering Zhengzhou University of Aeronautics Zhengzhou 450015 China

School of Mechanical Engineering Dongguan University of Technology Dongguan 523808 China

Sichuan Province Engineering Technology Research Center of Powder Metallurgy Chengdu University Chengdu 610106 China

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