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Numerical Simulation and Experimental Research on the Deformation of Equal Channel Angular Pressing of Al-5Ti-1B Aluminum Alloy Al-5Ti-1B铝合金等道角挤压变形的数值模拟与实验研究
热加工工艺 Pub Date : 2013-10-01 DOI: 10.4028/www.scientific.net/AMR.815.251
Wen Yu Zhang, X. Liu, X. Jin
{"title":"Numerical Simulation and Experimental Research on the Deformation of Equal Channel Angular Pressing of Al-5Ti-1B Aluminum Alloy","authors":"Wen Yu Zhang, X. Liu, X. Jin","doi":"10.4028/www.scientific.net/AMR.815.251","DOIUrl":"https://doi.org/10.4028/www.scientific.net/AMR.815.251","url":null,"abstract":"The effective strain size and distribution of Al-5Ti-1B alloy deformed by equal channel angular pressing (ECAP) were investigated through the finite element simulation by the die with outer corner ψ=0°, 20°, 30° and the friction coefficient f=0, 0.2, 0.3. The simulation results show that the effective strains decrease with the increase of the outer corner ψ from 0° to 30° with a constant f; the more uniform deformation were obtained under the conditions of large friction than that of small friction. Al-5Ti-1B alloy was produced by once path ECAP at room temperature under the die with the corner angle φ=90° and ψ=20°. The optical microscope and compressing test machine were performed. The results indicate that the grain size was obviously refined. The yield strength increased by 37.5% from 142.0MPa to 195.3MPa, and hardness increased by 24% from 45.2HV to 55.9 HV.","PeriodicalId":71507,"journal":{"name":"热加工工艺","volume":"815 1","pages":"251 - 255"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4028/www.scientific.net/AMR.815.251","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70643022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phase-Field Simulation of Interface Effect during Grain Nucleation 晶粒成核过程中界面效应的相场模拟
热加工工艺 Pub Date : 2012-03-01 DOI: 10.4028/www.scientific.net/AMR.490-495.3339
Fei Huo, Ji Zhao
{"title":"Phase-Field Simulation of Interface Effect during Grain Nucleation","authors":"Fei Huo, Ji Zhao","doi":"10.4028/www.scientific.net/AMR.490-495.3339","DOIUrl":"https://doi.org/10.4028/www.scientific.net/AMR.490-495.3339","url":null,"abstract":"In this paper, a phase field model based on Ginzburg-Landau theory is used to analyze the topological phenomena during grain growth. The simulation results show that two topological transformations exist during the grain growth—Neighbor Switching and Grain Annihilation; and we have found different kinds of topological events during the disappearance of a grain: direct vanishing of trilateral grain and pentagonal grain, as well as neighbor switching，which are right with classical topological theory and Euler formula. The simulation results are similar with experiments.","PeriodicalId":71507,"journal":{"name":"热加工工艺","volume":"490-495 1","pages":"3339 - 3343"},"PeriodicalIF":0.0,"publicationDate":"2012-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4028/www.scientific.net/AMR.490-495.3339","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70642542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Residual Stress and Corrosion Resistance Experimental Analysis of Closed Extruding Fine Blanking Parts Surface 封闭挤压精冲件表面残余应力及耐蚀性实验分析
热加工工艺 Pub Date : 2011-12-01 DOI: 10.4028/www.scientific.net/AMR.391-392.1483
Lin Lv, G. Ning, M. Chen
{"title":"Residual Stress and Corrosion Resistance Experimental Analysis of Closed Extruding Fine Blanking Parts Surface","authors":"Lin Lv, G. Ning, M. Chen","doi":"10.4028/www.scientific.net/AMR.391-392.1483","DOIUrl":"https://doi.org/10.4028/www.scientific.net/AMR.391-392.1483","url":null,"abstract":"In order to research the residual stress distribution and corrosion resistance of closed extruding fine blanking parts, surface and deep layer residual stress is tested and electrochemical corrosion behavior is also researched through polarization curve test in the 3.5%NaCl solution. The results show that: the surface’s residual stress is compressive stress, compressive stress value increases with the deformation degree, and the maximum value is 150 Mpa or so; Along with increase of depth from surface, residual stress first increases, then decreases, it is on the inferior surface reaches to maximum value, and the influence depth is 200μm; In the polarization curve test, closed extruding fine blanking parts' initial corrosion resistance is better than turning parts and blank, but with the test proceeding, the corrosion resistance drops, and closed extruding fine blanking parts’ final passivation phenomenon delays.","PeriodicalId":71507,"journal":{"name":"热加工工艺","volume":"391-392 1","pages":"1483 - 1487"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4028/www.scientific.net/AMR.391-392.1483","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70642664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of Sb on Microstructure and Mechanical Properties of Mg-5.5Al-1.2Y Alloy Sb对Mg-5.5Al-1.2Y合金组织和力学性能的影响
热加工工艺 Pub Date : 2011-02-21 DOI: 10.4028/www.scientific.net/AMR.194-196.1374
C. Li, Quan-an Li, Xing-yuan Zhang, Qing Zhang
{"title":"Effects of Sb on Microstructure and Mechanical Properties of Mg-5.5Al-1.2Y Alloy","authors":"C. Li, Quan-an Li, Xing-yuan Zhang, Qing Zhang","doi":"10.4028/www.scientific.net/AMR.194-196.1374","DOIUrl":"https://doi.org/10.4028/www.scientific.net/AMR.194-196.1374","url":null,"abstract":"The microstructure and mechanical properties of aged Mg-5.5Al-1.2Y magnesium alloy with Sb addition are investigated by optical microscope, SEM and X-ray diffraction analyzer. The results show that with proper content of Sb addition,the microstructure of Mg-5.5Al-1.2Y magnesium alloy is refined obviously and high melting point intermetallic compounds Sb3Y5 and Mg3Sb2 are formed. Meanwhile, the β-Mg17Al12 phase is more distributed. With the increase of Sb addition, the mechanical properties of the alloy at room and elevated temperature increase at first, and then decrease. When the content of Sb is up to 0.5%, the values of tensile strength and elongation at room temperature, 150ºC and 175ºC are up to their maxima synchronously, 241MPa /16.84%, 198MPa/20.27.86% and 169MPa/21.21% respectively.","PeriodicalId":71507,"journal":{"name":"热加工工艺","volume":"194-196 1","pages":"1374 - 1377"},"PeriodicalIF":0.0,"publicationDate":"2011-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4028/www.scientific.net/AMR.194-196.1374","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70641930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Rare Earth on Microstructure and Property of Refining Impure-Copper 稀土对精炼纯铜组织和性能的影响
热加工工艺 Pub Date : 2011-02-01 DOI: 10.4028/www.scientific.net/AMR.189-193.3982
Hao Chen, J. H. Li, M. Chen
{"title":"Effect of Rare Earth on Microstructure and Property of Refining Impure-Copper","authors":"Hao Chen, J. H. Li, M. Chen","doi":"10.4028/www.scientific.net/AMR.189-193.3982","DOIUrl":"https://doi.org/10.4028/www.scientific.net/AMR.189-193.3982","url":null,"abstract":"The self-prepared Cu-RE refining agents were used to refine impure-copper. The influences of RE elements on refinements and structures were studied and the mechanism of RE was discussed. The results show that by adding proper amounts of Cu-RE refining agents into impure-coppers, the refinements of RE on impure-coppers are perfect. Furthermore, the dendrites of the RE-refined ingot are refined and the structure becomes more homogeneous, leading that the electric conduction function and mechanics function of impure-copper have been improved.","PeriodicalId":71507,"journal":{"name":"热加工工艺","volume":"189-193 1","pages":"3982 - 3985"},"PeriodicalIF":0.0,"publicationDate":"2011-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4028/www.scientific.net/AMR.189-193.3982","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70642338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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