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| 累积叠轧焊温度对AZ31镁合金板材组织与性能的影响 |
| Effects of Accumulative Rolling Temperature on Microstructure and Properties of AZ31 Magnesium Alloy Sheet |
| Received:April 30, 2019 Revised:July 10, 2019 |
| DOI：10.3969/j.issn.1674-6457.2019.04.017 |
| 中文关键词: AZ31镁合金 温度 叠轧 力学性能 |
| 英文关键词: AZ31 magnesium alloy temperature accumulative roll-bonding mechanical properties |
| 基金项目:国家自然科学基金（51701034, 51805064）；重庆市基础研究与前沿探索项目(cstc2017jcyjAX0062, cstc2018jcyjAX0035, cstc2017jcyjAX0381)；重庆市教委科学技术研究项目(KJ1600922, KJQN201801137) |
| Author Name | Affiliation | | CHEN Jia-ming | Chongqing University of Technology, Chongqing 400054, China | | SONG Deng-hui | Chongqing University of Technology, Chongqing 400054, China | | ZHOU Tao | Chongqing University of Technology, Chongqing 400054, China | | SHI Lai-xin | Chongqing University of Technology, Chongqing 400054, China | | HU Li | Chongqing University of Technology, Chongqing 400054, China |
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| 中文摘要: |
| 目的 研究叠轧温度对AZ31镁合金板材组织与性能的影响。方法 在450 ℃和550 ℃下，对AZ31镁合金板材进行2道次叠轧，研究不同温度下板材界面裂纹的金相组织、RD-ND面晶体取向、力学性能以及断面形貌的异同。结果 450 ℃累积叠轧制备的ARB2镁合金板材室温断裂伸长率为2.3%，550 ℃累积叠轧制备的ARB2镁合金板材室温断裂伸长率为8%；450 ℃叠轧板材中动态再结晶晶粒大多数尺寸约为1~3 μm左右，550 ℃叠轧板材中动态再结晶晶粒大多数尺寸约为600 nm~2 μm。结论 通过提高温度，可改善界面结合性能，促进基面晶粒往非基面取向偏转，提升了叠轧板材的力学性能，使叠轧板材由较低温度下的脆性断裂向韧性断裂转变。 |
| 英文摘要: |
| The paper aims to study on effects of rolling temperature on microstructure and properties of AZ31 magnesium alloy sheets. The metallographic structure of interface crack, RD-ND crystal orientation, mechanical properties and the cross-section morphology of the AZ31 magnesium alloy sheet which was rolled respectively at the 450 ℃ and 550 ℃ were studied. The room temperature fracture elongation of ARB2 magnesium alloy sheet prepared by accumulative rolling at 450 ℃ was 2.3%, and that of ARB2 magnesium alloy sheet prepared by accumulative rolling at 550 was 8%; most of the dynamic recrystallization grains in 450 ℃ rolled sheet were about 1~3 μm, and in 550 were about 600 nm~2 μm. Improving the temperature can improve the interface bonding performance, promote the base level grain deflection to the base orientation, improve the mechanical properties of the accumulative roll-bonding sheet, and transform the sheet brittle fracture to ductile fracture by raising the temperature. |
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