| 高Y添加量对Mg-2Zn-1Mn合金组织和力学性能的影响 |
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| 引用本文： | 罗宇伦,张丁非,华建荣,代啟敏,钟诗宇,胥钧耀,胡光山,蒋斌,潘复生.高Y添加量对Mg-2Zn-1Mn合金组织和力学性能的影响[J].稀有金属材料与工程,2023,52(1):54-62. |
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| 作者姓名： | 罗宇伦 张丁非 华建荣 代啟敏 钟诗宇 胥钧耀 胡光山 蒋斌 潘复生 |
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| 作者单位： | 重庆大学 材料科学与工程学院，重庆 400045;重庆大学 国家镁合金材料工程技术研究中心，重庆 400044,重庆大学 材料科学与工程学院，重庆 400045;重庆大学 国家镁合金材料工程技术研究中心，重庆 400044,重庆大学 材料科学与工程学院，重庆 400045;重庆大学 国家镁合金材料工程技术研究中心，重庆 400044,重庆大学 材料科学与工程学院，重庆 400045;重庆大学 国家镁合金材料工程技术研究中心，重庆 400044,重庆大学 材料科学与工程学院，重庆 400045;重庆大学 国家镁合金材料工程技术研究中心，重庆 400044,重庆大学 材料科学与工程学院，重庆 400045;重庆大学 国家镁合金材料工程技术研究中心，重庆 400044,嘉兴学院 信息科学与工程学院，浙江 嘉兴 314001,重庆大学 材料科学与工程学院，重庆 400045;重庆大学 国家镁合金材料工程技术研究中心，重庆 400044,重庆大学 材料科学与工程学院，重庆 400045;重庆大学 国家镁合金材料工程技术研究中心，重庆 400044 |
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| 基金项目： | National Key Research and Development Program of China (2019YFC1520303); Natural Science Foundation of Zhejiang Province (LQ18E010003); Chongqing Science and Technology Commission (cstc2019jscx-mbdxX0031). |
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| 摘 要： | 采用光学显微镜、X射线衍射仪、X射线荧光法、电子探针显微分析仪、扫描电子显微镜、电子背散射衍射、透射电子显微镜和单轴拉伸测试等对Mg-2Zn-1Mn-x Y (x=0,1,3,5,7，质量分数，%)合金的显微组织和力学性能进行研究。结果表明：随着Y元素的加入，铸态合金的第二相由Mg7Zn3转变为Mg3Zn3Y2，最终转变为Mg12ZnY。Y元素的加入阻碍了动态再结晶的生长过程，使晶粒得到细化，但是进一步增加Y含量不会继续增强晶粒细化程度。挤压态Mg-2Zn-1Mn合金加入Y元素后，塑性呈现出先升高后下降的趋势，这可能是受到了织构取向变化和晶粒粗化的共同影响。此外，合金强度提高主要是由于细晶强化和第二相强化作用。Mg-2Zn-1Mn-7Y合金具有最佳的力学性能，其抗拉伸强度为357 MPa，屈服强度为262 MPa，延伸率为14%。
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| 关 键 词： | Mg-Zn-Mn-Y 组织 性能 织构 |
| 收稿时间： | 2022/3/5 0:00:00 |
| 修稿时间： | 2022/9/4 0:00:00 |
Effect of High Y Addition on Microstructure and Mechanical Properties of Mg-2Zn-1Mn Alloy |
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| Luo Yulun,Zhang Dingfei,Hua Jianrong,Dai Qimin,Zhong Shiyu,Xu Junyao,Hu Guangshan,Jiang Bin and Pan Fusheng.Effect of High Y Addition on Microstructure and Mechanical Properties of Mg-2Zn-1Mn Alloy[J].Rare Metal Materials and Engineering,2023,52(1):54-62. |
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| Authors: | Luo Yulun Zhang Dingfei Hua Jianrong Dai Qimin Zhong Shiyu Xu Junyao Hu Guangshan Jiang Bin and Pan Fusheng |
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| Affiliation: | College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing University, Chongqing 400044, China,College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing University, Chongqing 400044, China,College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing University, Chongqing 400044, China,College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing University, Chongqing 400044, China,College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing University, Chongqing 400044, China,College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing University, Chongqing 400044, China,College of Information Science and Engineering, Jiaxing University, Jiaxing 314001 China,College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing University, Chongqing 400044, China,College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China;National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing University, Chongqing 400044, China |
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| Abstract: | The microstructure and mechanical properties of Mg-2Zn-1Mn-xY (x=0, 1, 3, 5, 7, wt%) alloy were studied by optical microscope (OM), X-ray diffractometer (XRD), X-ray fluorescence spectrometer (XRF), electron probe microanalyzer (EPMA), scanning electron microscope (SEM), electron backscatter diffractometer (EBSD), transmission electron microscope (TEM), and uniaxial tensile tests. Results show that the secondary phases of as-cast alloys are changed from Mg7Zn3 to Mg3Zn3Y2 and finally transformed to Mg12ZnY with the addition of Y element. Although Y addition hinders the dynamic recrystallization process and therefore refines the grains, the excess Y addition cannot further refine the grains. Meanwhile, the ductility of as-extruded Mg-2Zn-1Mn alloy is increased and then decreased with the addition of Y element, which may be attributed to the synergistic effect of texture orientation and grain coarsening. Besides, the strength enhancement is mainly attributed to grain refinement strengthening and secondary phase strengthening. The Mg-2Zn-1Mn-7Y alloy has the optimal mechanical properties: the ultimate tensile strength is 357 MPa, yield strength is 262 MPa, and elongation is 14%. |
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| Keywords: | Mg-Zn-Mn-Y microstructure mechanical properties texture |
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