往复挤压对Mg5Sn1Si0.8Y镁合金组织和性能的影响
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MA Jian ],2 , GUO Xuefeng1 ·2 , CUI Hongbao1·2 , YANG Wenpeng1 ·2 , YU Heshuai],2 (1. School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
数)后,将铸徙挤压成棒材,随后在 3 4 0 ℃下进行 4 、 6 和 8 道次的往复挤压,并使用 DEFORM 3D 对挤压过程进行模拟 。 结果表
明,添加 Y 元素后,共品 Mg2 Si 明显细化,由复杂的汉字状转变为短棒状 。 经挤压破碎后,共品 Mg2Si 粒化效果明显,但球化效果
不及 Mg 2 Sn 。 在往复挤压过程中,受动态和静态再结晶影响,晶粒逐渐细化,平均品粒尺寸由正挤压态的 40 . 16 µm 减小 ~J 8 道次
Abstract, In order to study the effect of Reciprocating Extrusion (RE) with different passes on the m1crostructure and properties of Mg 5Sn lSi 0. SY magnesium alloys, the ingot was extruded into bars after adding 0. 8 % Y ( % ) and the bars were reciprocating extruded at 340 ℃ for 4, 6 and 8 passes which was simulated by DEFORM 3D. The results show that after the additio口 0 . 8 % Y element, the eutectic Mg2 Si is remarkably refined, wh ich changes from a complex Chinese character to a short rod-like form. The granulation effect of eutectic Mg2Si is obvious, but the spheroid ization effect is not as good as Mg2Sn after the RE. During the RE process, the grain is gradually refined due to the influnence of dynamic and static recrystallization. The mean grain size is reduced from 40 . 16 µm f in the forward extrus ion to 7. 68 µm for the 8th- pass RE. The elongation significantly increases from 6. 88 % to 10. 6 % , but the tensile strength decreases from 197 to 182 MPa due to weak texture. The fracture morphology shows that the dimples become sma ll er and more with the increase of extrusion pass, and the toughness of the material increases significantly. The inhomogeneous deformation results in different grain size in the RE process, which affects the mechanical properties of material.
2. Henan International Joint Research Laboratory for High performance Light Metallic Materials and Numerical Simulations, Henan Polytechnic University, Jiaozuo 454000, China)
第 9 卷第 5 期
2 0 1 9 年5 月
有色金属工程 Nonferrous Metals Engineenng
doi,10. 3969/ j. issn. 2095-1744. 2019. 05. 002
Vol. 9,No. 5
岛fay
20 19
往复挤压对 Mg-SSn- lSi-0. SY 揉合金
学性能 。
关键词: 往复挤压;续合金;组织和性能
中图分类号: TG146 . 2
文献标志码: A
ห้องสมุดไป่ตู้
文章编号: 2 095 1744(20 19)05 0009 08
Effect of Reciprocating Extrusion on the Microstructure and Properties 。f Mg-SSn-lSi-0. 8Y Magnesium Alloy
组织和性能的影响
马 健 1 ,2 ,郭学锋 1 ,2 ,崔红保 1,2 ,杨文月月 1,2 ,于合帅 1,2 ( 1. 河南理工大学材料科学与工程学院,河南焦作 454000;
2. 河南省高性能轻金属材料及其数值模拟国际联合实验室,河南焦作 454000)
摘 要: 为研究不同道次的往复挤压对 Mg-5 Sn- 1S i- 0. SY 筷合金组织和性能的影响,向 Mg-5 Sn- 1Si 合金中添加 0. 8%Y (质量分
往复挤 压 的 7. 68 µm ,延伸率增幅明显,由 6. 88% 增加至 10. 6% ,但受织构弱化影响,抗拉强度由 197 MPa 下降至 182 MPa 。 断口
形貌表明,随挤压道次 增加,韧窝变得小而多 , 材料韧性明显增加 。 往复挤压过程中的不均匀变形使得品粒大小不 一 ,影响材料力
数)后,将铸徙挤压成棒材,随后在 3 4 0 ℃下进行 4 、 6 和 8 道次的往复挤压,并使用 DEFORM 3D 对挤压过程进行模拟 。 结果表
明,添加 Y 元素后,共品 Mg2 Si 明显细化,由复杂的汉字状转变为短棒状 。 经挤压破碎后,共品 Mg2Si 粒化效果明显,但球化效果
不及 Mg 2 Sn 。 在往复挤压过程中,受动态和静态再结晶影响,晶粒逐渐细化,平均品粒尺寸由正挤压态的 40 . 16 µm 减小 ~J 8 道次
Abstract, In order to study the effect of Reciprocating Extrusion (RE) with different passes on the m1crostructure and properties of Mg 5Sn lSi 0. SY magnesium alloys, the ingot was extruded into bars after adding 0. 8 % Y ( % ) and the bars were reciprocating extruded at 340 ℃ for 4, 6 and 8 passes which was simulated by DEFORM 3D. The results show that after the additio口 0 . 8 % Y element, the eutectic Mg2 Si is remarkably refined, wh ich changes from a complex Chinese character to a short rod-like form. The granulation effect of eutectic Mg2Si is obvious, but the spheroid ization effect is not as good as Mg2Sn after the RE. During the RE process, the grain is gradually refined due to the influnence of dynamic and static recrystallization. The mean grain size is reduced from 40 . 16 µm f in the forward extrus ion to 7. 68 µm for the 8th- pass RE. The elongation significantly increases from 6. 88 % to 10. 6 % , but the tensile strength decreases from 197 to 182 MPa due to weak texture. The fracture morphology shows that the dimples become sma ll er and more with the increase of extrusion pass, and the toughness of the material increases significantly. The inhomogeneous deformation results in different grain size in the RE process, which affects the mechanical properties of material.
2. Henan International Joint Research Laboratory for High performance Light Metallic Materials and Numerical Simulations, Henan Polytechnic University, Jiaozuo 454000, China)
第 9 卷第 5 期
2 0 1 9 年5 月
有色金属工程 Nonferrous Metals Engineenng
doi,10. 3969/ j. issn. 2095-1744. 2019. 05. 002
Vol. 9,No. 5
岛fay
20 19
往复挤压对 Mg-SSn- lSi-0. SY 揉合金
学性能 。
关键词: 往复挤压;续合金;组织和性能
中图分类号: TG146 . 2
文献标志码: A
ห้องสมุดไป่ตู้
文章编号: 2 095 1744(20 19)05 0009 08
Effect of Reciprocating Extrusion on the Microstructure and Properties 。f Mg-SSn-lSi-0. 8Y Magnesium Alloy
组织和性能的影响
马 健 1 ,2 ,郭学锋 1 ,2 ,崔红保 1,2 ,杨文月月 1,2 ,于合帅 1,2 ( 1. 河南理工大学材料科学与工程学院,河南焦作 454000;
2. 河南省高性能轻金属材料及其数值模拟国际联合实验室,河南焦作 454000)
摘 要: 为研究不同道次的往复挤压对 Mg-5 Sn- 1S i- 0. SY 筷合金组织和性能的影响,向 Mg-5 Sn- 1Si 合金中添加 0. 8%Y (质量分
往复挤 压 的 7. 68 µm ,延伸率增幅明显,由 6. 88% 增加至 10. 6% ,但受织构弱化影响,抗拉强度由 197 MPa 下降至 182 MPa 。 断口
形貌表明,随挤压道次 增加,韧窝变得小而多 , 材料韧性明显增加 。 往复挤压过程中的不均匀变形使得品粒大小不 一 ,影响材料力