刘钊,孔德瑜,邓磊,等.铝合金塑性成形粗晶现象的研究进展[J].精密成形工程,2024,16(3):1-15.
LIU Zhao,KONG Deyu,DENG Lei,et al.Advancements in Investigating Coarse Grain Phenomena in Aluminum Alloy Plastic Deformation[J].Journal of Netshape Forming Engineering,2024,16(3):1-15. |
| 铝合金塑性成形粗晶现象的研究进展 |
| Advancements in Investigating Coarse Grain Phenomena in Aluminum Alloy Plastic Deformation |
| 投稿时间：2024-01-12 |
| DOI：10.3969/j.issn.1674-6457.2024.03.001 |
| 中文关键词: 铝合金 塑性成形 粗晶 机理 控制方法 |
| 英文关键词: aluminum alloy plastic deformation coarse grains mechanism control methods |
| 基金项目:国家自然科学基金(52090043) |
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| 摘要点击次数: 1082 |
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| 中文摘要: |
| 铝合金经过热塑性变形或者塑性变形+热处理后，可能发生晶粒异常长大而形成粗晶。粗晶会大幅降低构件的力学性能、耐腐蚀性能和抗疲劳性能，因此必须得到有效控制。对铝合金塑性成形粗晶的研究主要集中在2×××、6×××、7×××系热处理可强化型铝合金以及5×××系热处理不可强化型铝合金，研究内容已经覆盖塑性成形工艺、热处理制度、微观组织演变、数值仿真模拟等方面。为了明晰铝合金塑性成形构件粗晶现象的研究现状，为相关研究提供参考，对铝合金塑性成形粗晶现象的研究进展进行了梳理。首先，分析了材料成分、变形温度、变形速度、固溶温度、固溶时间和模具结构对晶粒异常长大的影响;其次，从晶粒取向分布、应变诱导储能和第二相钉扎作用的角度总结了晶粒异常长大的机理;再次，归纳了包括改变坯料初始状态、合理的锻造技术和中间形变热处理等有效抑制粗晶产生的方法;最后对未来的研究方向进行了展望。 |
| 英文摘要: |
| Aluminum alloys may undergo abnormal grain growth and form coarse grains during either hot plastic deformation or subsequent heat treatment after plastic deformation. Coarse grains significantly diminish the mechanical performance, corrosion resistance, and fatigue resistance of components, necessitating effective control measures. Research on coarse grains in aluminum alloy plastic deformation primarily focuses on heat-treatable 2×××, 6×××, and 7××× series aluminum alloys, as well as non-heat-treatable 5××× series luminum alloys. The research encompasses plastic deformation processes, heat treatment regimens, microstructural evolution, and numerical simulation. To elucidate the current research status on coarse grains in aluminum alloy plastic deformation components and provide a reference for relevant studies in this field, this paper systematically reviewed the research progress on the phenomenon of coarse grains in aluminum alloy plastic deformation. Firstly, the effects of material composition, deformation temperature, deformation rate, solution temperature, solution time, and mold structure on the abnormal growth of grains were analyzed. Secondly, the mechanisms of abnormal grain growth were summarized from the perspectives of grain orientation distribution, strain-induced stored energy, and the pinning effect of second-phase particles. Thirdly, effective methods to suppress the occurrence of coarse grains, including altering the initial state of the billet, employing reasonable forging techniques, and adopting intermediate deformation heat treatments were concluded. Finally, insights into future research directions in this field were put forward. |
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