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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：使用室温压工艺和随后的热压工艺通过粉末冶金（PM）制备Al-0.71重量％。使用温度范围为420至570℃的热压缩试验对PM Al-W合金的变形行为进行研究，并且应变率范围为0.001至5 s（-1）。在作为温度和应变速率的函数的函数获取应力 - 应变数据之后，通过动态材料模型构造和解释所描绘功耗效率变化的处理地图。 PM坯件调理的最佳温度和应变率组合分别为560-570℃和0.001秒（-1）。另外，在PM坯料上具有较高的生产效率的二级金属加工过程以0.01至0.1s（-1）的较高应变速率，低温从500至540℃。PM Al-W合金在540℃下成功挤出，RAM速度为2mm min（-1），挤出比为5：1。从15毫米的挤出棒中取出的测试样品的最终拉伸强度和伸长率分别为478MPa和15.4％。

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