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| Al，Zn对挤压Mg-1Mn合金晶粒组织和塑性变形机制的影响 |
| Effects of Al, Zn on the Grain Structure and Plastic Deformation Mechanism of As-Extruded Mg-1Mn Alloy |
| Received:June 02, 2021 |
| DOI：10.3969/j.issn.1674-6457.2021.04.015 |
| 中文关键词: 镁合金 挤压 晶粒组织 力学性能 |
| 英文关键词: Mg alloy extrusion grain structure mechanical properties |
| 基金项目:重庆科技学院科研基金(ckrc2020016);国家自然科学基金(51971042，51901028);重庆市教育委员会科学技术研究计划青年项目(KJ201903136636560) |
| Author Name | Affiliation | | SONG Kai | Nuclear Power Institute of China, Chengdu 610213, China | | PENG Peng | School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing 401331, China | | SONG Ze | College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China | | TANG Ai-tao | College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China | | SHE Jia | College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China | | ZHOU Shi-bo | College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China | | PAN Fu-sheng | College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China |
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| 中文摘要: |
| 目的 探索镁合金中常用合金化元素Al，Zn对挤压Mg-1Mn合金的晶粒组织和力学性能的影响，为含Mn合金的成分设计及商业化应用提供理论支撑。方法 在280 ℃下，对Mg-1Mn，Mg-1Mn-1Al和Mg-1Mn-2Zn合金进行热挤压，制备镁合金棒材，采用拉伸测试分析力学性能，利用电子背散射衍射技术观察晶粒组织，并通过粘塑性自洽模型研究塑性变形机制。结果 在3种合金中，Mg-1Mn-1Al的晶粒最为细小，平均晶粒尺寸为1.3 μm，屈服强度、抗拉强度和断裂伸长率分别为309 MPa，313 MPa和19.5%。结论 在Mg-1Mn合金中，与Zn相比，较低含量的Al具有更好的再结晶晶粒细化效果。Al，Zn的添加能够有效抑制基面<a>滑移，促进非基面滑移的开启。 |
| 英文摘要: |
| Effects of the alloying elements Al and Zn in magnesium alloys on grain structure and mechanical properties of extruded Mg-1Mn alloy were investigated in this study. It was beneficial to provide theoretical support for composition design and commercial application of Mn-containing alloys. The Mg-1Mn, Mg-1Mn-1Al and Mg-1Mn-2Zn alloys were hot extruded to prepare magnesium alloy rods at 280 ℃. The mechanical properties were analyzed by tensile test. The grain structure was studied by electron backscatter diffraction. The plastic deformation mechanism was studied by the visco-plastic self-consistent model. Among the three alloys, Mg-1Mn-1Al alloy exhibited the finest grains. The average grain size was refined to 1.3 μm. The tensile yield stress, ultimate tensile stress and fracture elongation are 309 MPa, 313 MPa and 19.5%, respectively. In the Mg-1Mn alloy, the effect of grain refinement of Al element was better than Zn element at lower content. The addition of Al and Zn effectively inhibited the basal <a> slip and promoted the activating of non-base plane slip. |
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