气孔对压铸AZ91镁合金力学性能影响的研究
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- 英文论文题名：Effect of gas pores on mechanical properties of high-pressure die-casting AZ91 magnesium alloy
- 论文作者：姜巍 ; 曹占义 ; 孙旭 ; 姜博 ; 刘利萍
- 英文论文作者：Jiang Wei ; Cao Zhanyi ; Sun Xu ; Jiang Bo ; Liu Liping ; School of Materials Science and Engineering ; Jilin University ; Datang northeast electric power test and research institute ; Department of Engineering and Technology ; Changchun Vocational Institute of Technology
- 年：2016
- 作者机构：吉林大学材料科学与工程学院;大唐东北电力试验研究所;长春职业技术学院工程技术分院;
- 论文关键词：显微组织 ; 三维重建 ; 有限元模拟 ; 镁合金 ; 力学性能
- 英文论文关键词：microstructure ; three-dimensional reconstruction ; finite element simulation ; magnesium alloy ; mechanical properties
- 会议召开时间：2016-08-16
- 会议录名称：第十届全国材料科学与图像科技学术会议暨校地企产学研合作创新论坛论文摘要集
- 语种：中文
- 分类号：TG249.2
- 学会代码：EGTA
- 会议名称：第十届全国材料科学与图像科技学术会议暨校地企产学研合作创新论坛
- 会议地点：中国河南洛阳
- 主办单位：中国体视学学会材料科学分会、中国金属学会材料科学分会
- 学会名称：中国体视学学会
- 页数：5
- 文件大小：1085k
- 原文格式：O
- 会议级别：全国
摘要
压铸AZ91镁合金在工业上有广泛应用,但显微气孔对合金力学性能有明显不利影响。本文采用系列截面法获得三维显微组织重构组织,确定气孔在试样中的分布特点,并运用有限元分析技术对气孔对压铸AZ91镁合金的力学性能的影响进行模拟。结果显示:随试样中最大气孔尺寸增大,抗拉强度和延伸率近线性降低;不同的气孔的分布情况对合金抗拉强度和延伸率有不同程度影响。
High-pressure die-casting(HPDC) AZ91 magnesium alloy is widely used in industry,but gas pores have negative effect on mechanical properties of the alloy.By using three-dimensional microstructure reconstruction based on serial sectioning,the characterization of gas pores in specimens was gained.Then the effect of gas pores on mechanical properties of HPDC AZ91 Mg alloy was studied by means of finite element simulation.The result showed that the ultimate tensile strength and elongation decrease with the increase of maximum value of the size of gas pores.Meanwhile,the ultimate tensile strength and elongation varied with different distribution of gas pores.
High-pressure die-casting(HPDC) AZ91 magnesium alloy is widely used in industry,but gas pores have negative effect on mechanical properties of the alloy.By using three-dimensional microstructure reconstruction based on serial sectioning,the characterization of gas pores in specimens was gained.Then the effect of gas pores on mechanical properties of HPDC AZ91 Mg alloy was studied by means of finite element simulation.The result showed that the ultimate tensile strength and elongation decrease with the increase of maximum value of the size of gas pores.Meanwhile,the ultimate tensile strength and elongation varied with different distribution of gas pores.
引文
[1]Balasundaram,A.&Gokhale,A.M Quantitative characterization of spatial arrangement of shrinkage and gas(air)pores in cast magnesium alloys.Materials Characterization,2001(46):419-426.
[2]Lee,S.G.,Gokhale,A.M.&Sreeranganathan,A.Reconstruction and visualization of complex 3D pore morphologies in a high-pressure die-cast magnesium alloy.Materials Science and Engineering A.2006(427):92-98.
[3]Caceres C.H.,Griffiths J.R.,Pakdel A.R.,Davidson C.J.,Microhardness mapping and the hardness-yield strength relabonship in high-pressure die-cast magnesium alloy AZ91[J].Materials Science and Engineering A,2005(402):258-268.
[2]Lee,S.G.,Gokhale,A.M.&Sreeranganathan,A.Reconstruction and visualization of complex 3D pore morphologies in a high-pressure die-cast magnesium alloy.Materials Science and Engineering A.2006(427):92-98.
[3]Caceres C.H.,Griffiths J.R.,Pakdel A.R.,Davidson C.J.,Microhardness mapping and the hardness-yield strength relabonship in high-pressure die-cast magnesium alloy AZ91[J].Materials Science and Engineering A,2005(402):258-268.