对Ti-6Al-2Zr-1Mo-1V合金进行等温恒应变速率压缩试验,利用压缩试验数据对比Prasad失稳准则和唯象型失稳准则,发现2种准则均预测出合金在应变速率为0.32～10 s-1范围内的塑性流动失稳现象,该失稳区随变形温度的降低具有逐渐向低应变速率范围扩展的趋势.经微观组织观察发现,Prasad准则不能预测到合金在750～800℃,0.001～0.0032s-1范围发生的局部流动和弯折失稳,而唯象型准则对合金在770～870℃、0.01～0.32 s-1和900～950℃、0.32～3.16 s-1区域出现的晶界裂纹、孔洞以及局部流动不能进行准确预测.结合 2种准则的优缺点,提出预测合金塑性流动失稳的新方法.
参考文献
| [1] | 王礼立;余同希;李永池.冲击动力学进展[M].合肥:中国科学技术大学出版社,1992:4. |
| [2] | 曾卫东,周义刚,舒滢,赵永庆,杨锦,张学敏.基于加工图的Ti-40阻燃钛合金热变形机理研究[J].稀有金属材料与工程,2007(01):1-6. |
| [3] | 鲁世强,李鑫,王克鲁,董显娟,李臻熙,曹春晓.基于动态材料模型的材料热加工工艺优化方法[J].中国有色金属学报,2007(06):890-896. |
| [4] | Prasad Y V R K;Gegel H L;Doraivelu S M et al.[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1984,15(10):1883. |
| [5] | Murty SVSN.;Rao BN. .On the development of instability criteria during hotworking with reference to IN 718[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):76-82. |
| [6] | Semiatin S L;Lahoti G D .[J].Metallurgical Transactions S,1981,12(10):1705. |
| [7] | Semiatin S L;Lahoti G D .[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1982,13:275. |
| [8] | Murty S.V. S. N.;Rao B.N. .Instability criteria for hot deformation of materials[J].International Materials Reviews,2000(1):15-26. |
| [9] | Prasad YVRK.;Seshacharyulu T. .Processing maps for hot working of titanium alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):82-88. |
| [10] | Balasubrahmanyam VV.;Prasad YVRK. .Deformation behaviour of beta titanium alloy Ti-10V-4.5Fe-1.5Al in hot upset forging[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):150-158. |
| [11] | Miller R M;Bieler T R;Semiatin S L .[J].Scripta Materialia,1999,40:1387. |
| [12] | Niu Y;Hou HL;Li MQ;Li ZQ .High temperature deformation behavior of a near alpha Ti600 titanium alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2008(1/2):24-28. |
| [13] | Nicolaou P D;Miller J D;Semiatin S L .[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2005,36(12):3461. |
| [14] | Semiatin S L;Goetz R L;Shell E B et al.[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1999,30(05):1411. |
| [15] | Semiatin SL.;Ghosh AK.;Shell EB.;Simon MP.;Fagin PN.;Seetharaman V. .Cavitation during hot tension testing of Ti-6A1-4V[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):92-110. |
| [16] | Prasad Y V R K;Seshacharyulu T .[J].International Materials Reviews,1998,43(06):243. |
| [17] | Murty S.V.S.N.;Rao B.N. .On tile flow localization concepts in the processing maps of titanium alloy Ti-24A1-2ONb[J].Journal of Materials Processing Technology,2000(1/2):103-109. |
| [18] | Sagar PK;Banerjee D;Prasad YVRK .Unstable flow during hot deformation of Ti-24Al-20Nb alloy[J].Materials Science and Technology: MST: A publication of the Institute of Metals,1997(9):755-760. |
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