Development of extrusion・ECAP one body type severe plastic working process with high plastic deformability to magnesium alloys

镁合金高塑性变形挤压·ECAP一体型严酷塑性加工工艺的开发

• 批准号: 17560629
• 负责人: FURUI Mitsuaki
• 金额: $ 2.18万
• 依托单位: University of Toyama
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17560629/
• 关键词: extrusion; ECAP; severe plastic deformation; magnesium-lithium alloy; superplastic property; grain refinement; 超塑性特性; ミクロ組織観察

Extrusion ・ECAP one body type severe plastic process with high plastic deformability to magnesium alloys was developed and was investigated about its working conditions for fabricating high quality materials with fine microstructure and excellent superplastic properties. Suitable working condition obtaining fine microstructure was 36:1 of reduction of area, 90 degree of shear angle, 1mm/s of working rate and 293K of working temperature. Following this suitable working condition, a Mg-8mass%Li alloy exhibited superplasticity at a testing temperature of 473K. A maximum fracture elongation was 1610% attained with an initial strain rate of 1.5×10^<-4> s^<-1>. This elongation was 1.6 times compared with the case of separate working of extrusion and ECAP. The strain rate sensitivities under the optimum superplastic conditions were measured as about 0.7. Significant phase refinement and dispersion were achieved in a cast Mg-8%Li alloy through processing by this developing process. Extrusion ・ECAP one body type severe plastic process was demonstrated through this research for superplastic working of magnesium alloys with high speed, low temperature and cavity-less.

开发了镁合金挤压·ECAP一体式强塑性加工工艺，研究了其加工条件，以获得组织细小、性能优异的镁合金材料。获得细晶组织的适宜工艺条件为：断面收缩率36：1，剪切角90 °，加工速度1 mm/s，加工温度293 K。在此工艺条件下，Mg-8mass%Li合金在473 K时表现出超塑性。当初始应变速率为1.5×10^ s^时，断裂伸长率达到1610%<-4><-1>.与挤压和ECAP分开加工的情况相比，该延伸率为1.6倍。在最佳超塑性条件下测得的应变速率敏感性约为0.7。通过该工艺的加工，铸造Mg-8%Li合金的相得到了显着的细化和分散。通过本研究，论证了挤压·ECAP一体式剧烈塑性加工方法，可实现镁合金高速、低温、无空洞的超塑性加工。

项目成果

ECAP加工を施したMg-8 mass%Li 2相合金の超塑性

• DOI: 10.2320/jinstmet.70.729
• 发表时间: 2006-09
• 期刊: Journal of The Japan Institute of Metals
• 作者: 光明 古井;Cheng Xu;哲夫 曾田;誠 井上;博之 穴田;Terence G. Langdon

Improving the superplastic properties of a two-phase Mg-8mass%Li alloy through processing by ECAP

提高%20the%20超塑性%20性能%20of%20a%20两相%20Mg-8mass%Li%20合金%20通过%20加工%20by%20ECAP

• 发表时间: 2005
• 期刊: Materials Science ＆ Engineering A410-411
• 作者: M.Furui;C.Xu;T.Aida;M.Inoue;H.Anada;T.G.Langdon
• 通讯作者: T.G.Langdon

Influence of preliminary extrusion conditions on the superplastic properties of a magnesium alloy processed by ECAP

• DOI: 10.1016/j.actamat.2006.09.027
• 发表时间: 2007-02-01
• 期刊: ACTA MATERIALIA
• 影响因子: 9.4
• 作者: Furui, Mitsuaki;Kitamura, Hiroki;Langdon, Terence G.
• 通讯作者: Langdon, Terence G.

Superplastic Deformation of a Mg-8%Li Alloy Processed at Room Temperature by ECAP

超塑%20变形%20of%20a%20Mg-8%Li%20合金%20加工%20at%20房间%20温度%20by%20ECAP

• 发表时间: 2007
• 期刊: Material Science Forum 539-543
• 作者: M.Furui;H.Kitamura;M.Fukuta;H.Anada;T.G.Langdon
• 通讯作者: T.G.Langdon

Superplastic Deformation of a Mg-8%Li Alloy Processed at Room Temperauture by ECAP

超塑%20变形%20of%20a%20Mg-8%Li%20合金%20加工%20at%20房间%20温度%20by%20ECAP

• 发表时间: 2007
• 期刊: Materials Science Forum 539-543巻
• 作者: M.furui;H.Kitamura;M.Fukura;H.Anada;T.G.Langdon
• 通讯作者: T.G.Langdon