Enhancement of Mechanical Properties of Extruded Mg-9Al-1Zn-1MM-0.7CaO-0.3Mn Alloy Through Pre-aging Treatment

被引：17

作者：

Jeong, Seok Hoan ^{[1
]}

Kim, Yong Joo ^{[1
]}

Kong, Kyung Ho ^{[1
]}

Cho, Tae Hee ^{[1
]}

Kim, Young Kyun ^{[3
]}

Lim, Hyun Kyu ^{[3
]}

Kim, Won Tae ^{[2
]}

Kim, Do Hyang ^{[1
]}

机构：

[1] Yonsei Univ, Dept Mat Sci & Engn, Ctr Noncrystalline Mat, Seoul 03722, South Korea

[2] Cheongju Univ, Dept Opt Engn, Cheongju 28503, South Korea

[3] Korea Inst Ind Technol, Rare Met R&BD Grp, Incheon 21999, South Korea

来源：

METALS AND MATERIALS INTERNATIONAL | 2018年 / 24卷 / 02期

关键词：

Magnesium alloy; Extrusion; Pre-aging; Dynamic recrystallization; MICROSTRUCTURE; SN; TEXTURE; TENSILE; TEMPERATURE; BEHAVIOR;

D O I：

10.1007/s12540-018-0027-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of pre-aging treatment before extrusion has been investigated in Mg-9.0Al-1.0Zn-1MM-0.7CaO-0.3Mn alloy. The as-cast microstructure consists of alpha-Mg dendrite with secondary solidification phase particles, (Mg, Al)(2)Ca, beta-Mg17Al12 and Al11RE3 at the inter-dendritic region. After extrusion, beta-Mg17Al12 precipitates are present, but higher density and more homogeneous distribution in pre-aged alloy. In addition, mu m-scale banded bulk beta-Mg17Al12 particles are generated during extrusion. Al11RE3 particles are broken into small particles, and are aligned along the extrusion direction. (Mg, Al)(2)Ca particles are only slightly elongated along the extrusion direction, providing stronger particle stimulated nucleation (PSN) effect by severe deformation during extrusion. The mechanical properties can be significantly enhanced by introducing pre-aging treatment, i.e. beta-Mg17Al12 precipitates provide grain refining and strengthening effects and (Mg, Al)(2)Ca particles provide PSN effect.

引用

页码：391 / 399

页数：9

共 24 条

[1]

Anyanwu IA, 2004, MAT SCI ENG A-STRUCT, V380, P93, DOI [10.1016/j.msea.2004.03.039, 10.1016/j.mesa.2004.03.039]

[2] Effect of Al contents on microstructures, tensile and creep properties of Mg-Al-Sr-Ca alloy [J].

Bai, Jing ;

Sun, Yangshan ;

Xue, Feng ;

Xue, Shan ;

Qiang, Jing ;

Zhu, Tianbai .

JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 437 (1-2) :247-253

[3] Study of the microstructure, texture and tensile properties of as-extruded AZ91 magnesium alloy [J].

Ding, Hanlin ;

Liu, Liufa ;

Kamado, Shigeharu ;

Ding, Wenjiang ;

Kojima, Yo .

JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 456 (1-2) :400-406

[4] Superior light metals by texture engineering: Optimized aluminum and magnesium alloys for automotive applications [J].

Hirsch, J. ;

Al-Samman, T. .

ACTA MATERIALIA, 2013, 61 (03) :818-843

[5] Improved mechanical properties of Mg-7.6Al-0.4Zn alloy through aging prior to extrusion [J].

Jung, Jae-Gil ;

Park, Sung Hyuk ;

Yu, Hui ;

Kim, Young Min ;

Lee, Young-Kook ;

You, Bong Sun .

SCRIPTA MATERIALIA, 2014, 93 :8-11

[6]

Kielbus A., 2007, J ACHIEVEMENTS MAT M, V20, P459

[7] Effect of Aging Time and Temperature on the Aging Behavior in Sn Containing AZ91 Alloy [J].

Kim, Jeong Kyun ;

Oh, Seung Hyun ;

Kim, Kang Cheol ;

Kim, Won Tae ;

Kim, Do Hyang .

METALS AND MATERIALS INTERNATIONAL, 2017, 23 (02) :308-312

[8] Effect of Ce addition on the microstructure and mechanical properties of extruded Mg-Sn-Al-Zn alloy [J].

Kim, Sang-Hoon ;

Jung, Jae-Gil ;

You, Bong Sun ;

Park, Sung Hyuk .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 657 :406-412

[9] Effect of Pre-Precipitation on Microstructure and Mechanical Properties of Extruded Mg-Sn-Zn Alloys [J].

Kim, Young Kyun ;

Cho, Tae Lee ;

Jeong, Seok Hoan ;

Kim, Won Tae ;

Kim, Do Hyang .

METALS AND MATERIALS INTERNATIONAL, 2015, 21 (04) :741-745

[10] Comparison of static recrystallization behavior in hot rolled Mg-3Al-1Zn and Mg-3Zn-0.5Ca sheets [J].

Lee, Jong-Youn ;

Yun, Young-Su ;

Suh, Byeong-Chan ;

Kim, Nack-Joon ;

Kim, Won-Tae ;

Kim, Do-Hyang .

JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 589 :240-246

← 1 2 3 →