Yu-chuan HUANG , Quan-da ZHANG , Si-jie OUYANG , Fu-zhen SUN , Jia-wei SUN , Hui-yu LI , Guo-hua WU , Pei-jun CHEN , Wen-cai LIU
{"title":"锌和钆含量及其比例对铸造和挤压成型 Mg-8Li 合金微观结构和机械性能的影响","authors":"Yu-chuan HUANG , Quan-da ZHANG , Si-jie OUYANG , Fu-zhen SUN , Jia-wei SUN , Hui-yu LI , Guo-hua WU , Pei-jun CHEN , Wen-cai LIU","doi":"10.1016/S1003-6326(23)66435-0","DOIUrl":null,"url":null,"abstract":"<div><p>The effects of contents of Zn and Gd elements and their mass ratios on microstructure and mechanical properties of as-cast and as-extruded Mg−8Li alloys were investigated. After extrusion, the precipitates are broken, and fine spherical particles with size about 100 nm are found to disperse in the <em>β</em>-Li. The bi-modal structure consisting of long-strip-like coarse-grain <em>α</em>-Mg and recrystallized fine-grain <em>β</em>-Li is formed. The strength and plasticity of the alloys are greatly improved after extrusion, and the YS and UTS increase with the increase of Zn and Gd contents. The Mg−8Li−8Zn−2Gd alloy exhibits an optimum comprehensive performance with the YS of 274 MPa, UTS of 283 MPa, and EL of 39.9%. The bi-modal structure strengthening consisting of the fine crystal strengthening of <em>β</em>-Li and texture strengthening of <em>α</em>-Mg, and the dispersion strengthening of precipitations are the main strengthening mechanisms.</p></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":null,"pages":null},"PeriodicalIF":4.7000,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1003632623664350/pdf?md5=48c56644140abe1000c0320ca7442d57&pid=1-s2.0-S1003632623664350-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Effects of Zn and Gd contents and their ratios on microstructure and mechanical properties of as-cast and as-extruded Mg−8Li alloys\",\"authors\":\"Yu-chuan HUANG , Quan-da ZHANG , Si-jie OUYANG , Fu-zhen SUN , Jia-wei SUN , Hui-yu LI , Guo-hua WU , Pei-jun CHEN , Wen-cai LIU\",\"doi\":\"10.1016/S1003-6326(23)66435-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The effects of contents of Zn and Gd elements and their mass ratios on microstructure and mechanical properties of as-cast and as-extruded Mg−8Li alloys were investigated. After extrusion, the precipitates are broken, and fine spherical particles with size about 100 nm are found to disperse in the <em>β</em>-Li. The bi-modal structure consisting of long-strip-like coarse-grain <em>α</em>-Mg and recrystallized fine-grain <em>β</em>-Li is formed. The strength and plasticity of the alloys are greatly improved after extrusion, and the YS and UTS increase with the increase of Zn and Gd contents. The Mg−8Li−8Zn−2Gd alloy exhibits an optimum comprehensive performance with the YS of 274 MPa, UTS of 283 MPa, and EL of 39.9%. The bi-modal structure strengthening consisting of the fine crystal strengthening of <em>β</em>-Li and texture strengthening of <em>α</em>-Mg, and the dispersion strengthening of precipitations are the main strengthening mechanisms.</p></div>\",\"PeriodicalId\":23191,\"journal\":{\"name\":\"Transactions of Nonferrous Metals Society of China\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.7000,\"publicationDate\":\"2024-03-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S1003632623664350/pdf?md5=48c56644140abe1000c0320ca7442d57&pid=1-s2.0-S1003632623664350-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Transactions of Nonferrous Metals Society of China\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1003632623664350\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of Nonferrous Metals Society of China","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1003632623664350","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
Effects of Zn and Gd contents and their ratios on microstructure and mechanical properties of as-cast and as-extruded Mg−8Li alloys
The effects of contents of Zn and Gd elements and their mass ratios on microstructure and mechanical properties of as-cast and as-extruded Mg−8Li alloys were investigated. After extrusion, the precipitates are broken, and fine spherical particles with size about 100 nm are found to disperse in the β-Li. The bi-modal structure consisting of long-strip-like coarse-grain α-Mg and recrystallized fine-grain β-Li is formed. The strength and plasticity of the alloys are greatly improved after extrusion, and the YS and UTS increase with the increase of Zn and Gd contents. The Mg−8Li−8Zn−2Gd alloy exhibits an optimum comprehensive performance with the YS of 274 MPa, UTS of 283 MPa, and EL of 39.9%. The bi-modal structure strengthening consisting of the fine crystal strengthening of β-Li and texture strengthening of α-Mg, and the dispersion strengthening of precipitations are the main strengthening mechanisms.
期刊介绍：
The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.
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