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首页> 外文期刊>Key Engineering Materials >Grain Refinement and Strengthening of a Cylindrical Pure-Aluminum Specimen by using Modified Equal-Channel Angular Pressing Technique
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Grain Refinement and Strengthening of a Cylindrical Pure-Aluminum Specimen by using Modified Equal-Channel Angular Pressing Technique

机译：改进的等通道角挤压技术对圆柱形纯铝试样的晶粒细化和强化

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摘要

A new grain refinement and strengthening technique by modified ECAP (equal-channel angular pressing) technique was proposed in this study. ECAP technique is an effective technique for grain refinement and strengthening of metal material. This technique gives high shear plastic strain to the material without geometric transformation of the specimen. However, traditional ECAP technique is restricted by material type and size, especially length. Such kinds of restrictions cause various problems in practical use. We modified traditional ECAP dies and processes to allow high plastic strain for long-length pure-aluminum specimens. Then, grain distribution was observed using a microscope, grain size was determined by the Jeffries and the Heyn methods, and strengthening was investigated by micro-Vickers hardness test. Then the effectiveness of proposed grain refinement or strengthening techniques was discussed.
机译：提出了一种新的通过改进的ECAP（等通道角挤压）技术进行晶粒细化和强化的技术。 ECAP技术是一种用于细化和强化金属材料的有效技术。这种技术使材料具有高剪切塑性应变，而无需对试样进行几何变形。但是，传统的ECAP技术受材料类型和尺寸（尤其是长度）的限制。这种限制在实际使用中引起各种问题。我们对传统的ECAP模具和工艺进行了修改，以使长纯铝试样具有较高的塑性应变。然后，使用显微镜观察晶粒分布，通过Jeffries和Heyn方法确定晶粒尺寸，并通过显微维氏硬度试验研究强化。然后讨论了提出的晶粒细化或强化技术的有效性。

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