等径角轧制AM60镁合金板材的显微组织与力学性能
Microstructure and Mechanical Properties of AM60 Magnesium Alloy Sheet Processed by Equal Channel Angular Rolling
摘 要
采用等径角轧制工艺制备了AM60镁合金板材,并对轧制前后板材的显微组织与力学性能进行了对比.结果表明:经过等径角轧制后,板材晶粒取向由轧制前的(0002)基面取向演化为非基面取向,晶粒细化并有大量细密孪晶出现;板材强度明显提高,抗拉强度由轧制前的222 MPa增大到372 MPa,屈服强度由156 MPa增大到260 MPa,断后伸长率略有增加.
等径角轧制
显微组织
力学性能
AM60 magnesium alloy sheet
ECAR
microstructure
mechanical property
Abstract
AM60 magnesium alloy sheets were prepared by equal channel angular rolling (ECAR),the microstructure and mechanical properties were examined.It was found that the orientation of the sheet processed by ECAR was changed and the crystal orientation evolved from (0002) basal plane orientation to non-basal plane.Compared with as-received sheet,the grain size decreased and refined twins were presented.The strength of the sheets after ECAR was enhanced obviously,the ultimate tensile strength increased from 222 to 372 MPa and the yield strength increased from 156 to 260 MPa.The elongation increased slightly.
中图分类号 TG335.19
所属栏目
基金项目 国家自然科学基金资助项目(50674043)
收稿日期 2007/7/11
修改稿日期 2007/11/26
网络出版日期
作者单位点击查看
备注仇治勤(1981-),男,山东潍坊人,硕士研究生.
引用该论文: QIU Zhi-qin,CHEN Zhen-hua,XIA Wei-jun,CHEN Ding. Microstructure and Mechanical Properties of AM60 Magnesium Alloy Sheet Processed by Equal Channel Angular Rolling[J]. Materials for mechancial engineering, 2008, 32(5): 48～51
仇治勤,陈振华,夏伟军,陈鼎. 等径角轧制AM60镁合金板材的显微组织与力学性能[J]. 机械工程材料, 2008, 32(5): 48～51
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参考文献
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【2】Kalidindi S R.Modeling anistroptropic strain hardeningand deformation textures in low stacking fault energy material[J].International Journal of Plastisity,2001,17:837-860.
【3】Poss R.Sheet metal production of magnesium[J].Materials Science Forum,2003,419/422:327-336.
【4】Perez-Prado M T,Valle J A,Contreras J M,et al.Microstructural evolution during large strain hot rolling of an AM60 Mg alloy[J].Scripta Materialia,2004,50:661-665.
【5】Valle J A,Prado M T,Ruano O A.Texture evolution during large strain hot rolling of the AM61 Mg alloy[J].Mater Sci Eng A,2003,A355:68-78.
【6】Mabuchi M,Iwasaki H,Yanase K,et al.Low temperature superplasticity in an AZ91 Magnesium alloy processed by ECAE[J].Scripta Materialia,1997,36(6):681-686.
【7】Kim W J,Hong S I,Kim Y S,et al.Texture development and its effect on mechanical properties of an AZ61 Mg alloy fabricated by equal channel angular pressing[J].Acta Materialia,2003,51:3293-3307.
【8】Horita Z,Furukawa M,Nemoto M,et al.Superplastic forming at high strain rates after severe plastic deformation[J].Acta Mater,2000,48(14):3633-3640.
【9】Yoshida Y,Cisar L,Kamado S,et al.Effect of microstructure factors on tensile properties of an ECAE-processed AZ31 magnesium alloy[J].Mater Trans,2003,44(4):468-475.
【10】Koike J.New deformation mechanisims in fine grain Mg alloy[J].Materials Sciences Forum,2003,419/422:189-194.
【11】程永奇,陈振华,夏伟军,等.等径角轧制AZ31镁合金板材的组织与性能[J].中国有色金属学报,2005,15(9):1369-1375.
【12】程永奇.AZ31镁合金板材等径角轧制及冲压性能研究[D].长沙:湖南大学,2007.
【13】Friedrich H,Schumann S.Research for a “new age of magnesium” in the automotive industry[J].Journal of Materials Processing Technology,2001,117:276-281.
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