Development of the continuous process method for ECAP using a tri-axis rotary die and microstructural evolution of semi-solid aluminium alloy
Development of the continuous process method for ECAP using a tri-axis rotary die and microstructural evolution of semi-solid aluminium alloy
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DOI：
10.2495/hpsm120101
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发表时间：
2012-06
期刊：
影响因子：
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通讯作者：
K. Natori;F. Nomura;Y. Arao;Tatsuya Tanaka
中科院分区：
文献类型：
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作者：
K. Natori;F. Nomura;Y. Arao;Tatsuya Tanaka
本研究开发了一种可提供三维应变的连续ECAP工艺。创建具有三轴交叉通道的模具，所述三轴交叉通道具有90°的通道角φ和0°的曲率φ。结果表明，采用所研制的模具，在573 K、0.5mm/sec的挤压速度下，可以实现AC 4CH铝合金Bc路线的连续ECAP变形。与非连续的传统方法相比，连续方法将处理时间缩短了一半。晶粒从100μm细化到约2μm。加工8道次的工件的韧性比铸态合金高4倍。
The continuous ECAP process which can provide three-dimensional strain was developed in this study. A die with tri-axis crossed channels having channel angle φ of 90° and curvature ψ of 0° was created. As a result, continuous ECAP process via route Bc for AC4CH aluminium semi-solid alloy could be performed at 573K at pressing speed of 0.5mm/sec using the developed die. The continuous method cut the processing time in half compared to the non-continuously conventional method. The grains became fine from 100μm to approximately 2μm. Workpiece processed 8 passes exhibited four times higher toughness than as-cast alloy.