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首页> 外文期刊>Journal of Materials Engineering and Performance >Processing Map of Powder Metallurgy Al-W Alloys at Elevated Temperatures
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Processing Map of Powder Metallurgy Al-W Alloys at Elevated Temperatures

机译：在高温下处理粉末冶金Al-W合金的地图

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摘要

An Al-0.71 wt.% W alloy was prepared via powder metallurgy (PM) using a room-temperature pressing process and a subsequent hot-pressing process. Studies of the deformation behavior of the PM Al-W alloy were conducted using hot-compression tests in the temperature range from 420 to 570 degrees C and a strain rate range from 0.001 to 5 s(-1). After the stress-strain data were acquired as a function of temperature and strain rate, processing maps that depict the variation in the power dissipation efficiency were constructed and interpreted via the dynamic materials model. The optimum temperature and strain rate combination for PM billet conditioning were demonstrated to be 560-570 degrees C and 0.001 s(-1), respectively. Additionally, a secondary metal working process with a higher production efficiency on the PM billet was conducted at a higher strain rate from 0.01 to 0.1 s(-1) and at a low temperature from 500 to 540 degrees C. The PM Al-W alloy was successfully extruded at 540 degrees C with a ram speed of 2 mm min(-1) and an extrusion ratio of 5:1. The ultimate tensile strength and elongation of the test sample taken from the 15-mm-diameter as-extruded rods were 478 MPa and 15.4%, respectively.
机译：通过粉末冶金（PM），使用室温压制工艺和随后的热压工艺制备了Al-0.71 wt.%W合金。在420至570摄氏度的温度范围内，应变速率在0.001至5秒（-1）的范围内，采用热压缩试验对粉末冶金铝钨合金的变形行为进行了研究。在获得作为温度和应变速率函数的应力-应变数据后，构建描述功耗效率变化的处理图，并通过动态材料模型进行解释。粉末冶金坯料处理的最佳温度和应变速率组合分别为560-570摄氏度和0.001秒（-1）。此外，在0.01到0.1s（-1）的高应变速率和500到540摄氏度的低温下，对粉末冶金坯料进行了具有更高生产效率的二次金属加工。粉末冶金铝钨合金在540摄氏度下成功挤压，冲压速度为2毫米分钟（-1），挤压比为5:1。从直径为15 mm的挤压棒材中提取的试样的极限抗拉强度和伸长率分别为478 MPa和15.4%。

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