Improved properties of Ti-6Al-4V by combining isothermal equal-channel angular processing and hot-extrusion
Improved properties of Ti-6Al-4V by combining isothermal equal-channel angular processing and hot-extrusion
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DOI：
10.1080/02670836.2019.1645389
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发表时间：
2019-07-30
影响因子：
1.8
通讯作者：
Ketabchi, Mostafa
中科院分区：
文献类型：
--
作者：
Arabi, Hamid;Ketabchi, Mostafa
本工作的目的是研究热挤压对 ECAP 加工的 Ti-6Al-4V (wt-%) 合金微观结构的影响。首先，将采用等通道角挤压（ECAP）加工的Ti-6Al-4V合金在950℃下预热6分钟，然后在900℃下进行热挤压。热挤压使晶粒尺寸最小化，机械强度最大化。因此，结果表明，ECAP 加工的 Ti-6Al-4V 合金可以在不影响任何机械性能的情况下进行热挤压。因此，对于通过ECAP加工的Ti-6Al-4V，可以利用在热挤压中应用减小截面的能力，而不用担心性能的降低。
The aim of this work was to study effects of hot extrusion on the microstructure of Ti-6Al-4V (wt-%) alloy processed by ECAP. Firstly, an isothermally Ti-6Al-4V alloy processed by Equal channel angular pressing(ECAP) was preheated at 950 degrees C for 6 min and then hot extruded at 900 degrees C. The hot extrusion minimised the grain size and maximised the mechanical strength. Therefore, it was demonstrated that hot extrusion of Ti-6Al-4V alloys that processed by ECAP could be performed without compromising any mechanical properties. Therefore, it is possible to use the ability to apply a reduced cross-section in hot extrusion for an Ti-6Al-4V processed by ECAP without concern about the reduction of properties.