等径角轧制ZK60镁合金板材的组织与性能
Microstructure and Mechanical Properties of ZK60 Magnesium Alloy Sheets Processed by Equal Channel Angular Rolling
摘 要
对采用等径角轧制工艺(ECAR)制备的ZK60镁合金板材研究发现,与直接轧制的板材相比,等径角轧制板材的晶粒取向由(0002)基面取向演化为非基面取向,经等径角轧制后,板材晶粒没有得到细化,同时形成了大量的平行排列的细密孪晶,强度明显提高.与1个道次直接轧制的板材相比,1个道次等径角轧制的板材其抗拉强度由271.7 MPa增大到328.3 MPa,但伸长率由25.5%降低至8.5%.
ZK60镁合金板材
晶粒取向
equal channel aqngular rolling
ZK60 magnesium alloy sheet
crystal orientation
Abstract
Equal channel angular rolling(ECAR) was applied to prepare ZK60 magnesium alloy sheets.The orientation of the sheets processed by ECAR was changed and the crystal orientation evolved from (0002) basal orientation to non-basal orientation.Compared with directional rolled sheets through 1 pass,the grain size was not refined and a lot of parallel twins were presented,and the strength of the sheets processed by ECAR 1 pass was improved from 271.7 MPa to 328.3 MPa,but the elongation to failure was decreased from 25.5% to 8.5%.
中图分类号 TG146.22
所属栏目
基金项目 湖南省重点项目(03JKY1016)和湖南省重大专项资助项目(2004年度)
收稿日期 2005/4/25
修改稿日期 2005/7/2
网络出版日期
作者单位点击查看
备注程永奇(1980-),男,河南南阳人,博士研究生.
引用该论文: CHENG Yong-qi,FU Ding-fa,XIA Wei-jun,WU You-wu,LI Zhi-hua. Microstructure and Mechanical Properties of ZK60 Magnesium Alloy Sheets Processed by Equal Channel Angular Rolling[J]. Materials for mechancial engineering, 2006, 30(6): 37～39
程永奇,傅定发,夏伟军,吴有伍,李志华. 等径角轧制ZK60镁合金板材的组织与性能[J]. 机械工程材料, 2006, 30(6): 37～39
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参考文献
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【11】Lee J C,Seok H K,Suh J Y.Microstructural evolutions of the Al strip prepared by cold rolling and continuous equal channel angular pressing[J].Acta Materialia,2002,50:4005-4019.
【12】Koike J,Ohyama R,Kobayashi T,et al.Grain-boundary sliding in AZ31 magnesium alloys at room temperature to 523 K[J].Materials Transactions,2003,44(4):445-451.
【2】Poss R.Sheet metal production of magnesium[J].Materials Science Forum,2003,419-422:327-336.
【3】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.
【4】Iwanaga K,Tashiro H,Okamoto H,et al.Improvement of formability from room temperature to warm temperature in AZ-31 magnesium alloy[J].Journal of Materials Processing Technology,2004,155-156:1313-1316.
【5】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.
【6】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.
【7】Yoshida Y,Cisar L,Kamado S,et al.Effect of microstructural factors on tensile properties of an ECAE-processed AZ31 magnesium alloy[J].Mater Trans,2003,44(4):468-475.
【8】Koike J.New deformation mechanisms in fine-grain Mg alloys[J].Materials Science Forum,2003,419-422:189-194.
【9】Saito Y,Utsunomiya H,Suzuki H.Improvement in the r-value of aluminum strip by a continuous shear deformation process[J].Scripta Materialia,2000,42:1139-1144.
【10】Lee J C,Seok H K,Han J H,et al.Controlling the textures of the metal strips via the continuous confined strip shearing(C2S2) process[J].Materials Research Bulletin,2001,36:997-1004.
【11】Lee J C,Seok H K,Suh J Y.Microstructural evolutions of the Al strip prepared by cold rolling and continuous equal channel angular pressing[J].Acta Materialia,2002,50:4005-4019.
【12】Koike J,Ohyama R,Kobayashi T,et al.Grain-boundary sliding in AZ31 magnesium alloys at room temperature to 523 K[J].Materials Transactions,2003,44(4):445-451.
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