对全片层TA15钛合金进行等温恒应变速率压缩试验,采用Prasad失稳判据预测合金在750～1100℃,0.001～10s-1热力参数范围内的塑性流动失稳,并对变形后试样进行宏观和微观观察.结果表明,全片层TA15钛合金在试验参数范围内热变形时存在较大区域的流动失稳,且随着变形温度的降低,失稳区范围有从高应变速率向低应变速率逐渐扩展的趋势.在(α+β)两相区变形,失稳缺陷主要有宏观剪切裂纹、原始β晶界裂纹和局部流动三种形式.在β单相变形,失稳主要是原始β晶粒沿着垂直于压缩轴线方向拉长,且在部分晶界附近分布着变形带.
参考文献
| [1] | 李兴无,沙爱学,张旺峰,储俊鹏,马济民.TA15合金及其在飞机结构中的应用前景[J].钛工业进展,2003(04):90-94. |
| [2] | 唐泽,杨合,孙志超,李志燕,段桦.TA15钛合金高温变形微观组织演变分析与数值模拟[J].中国有色金属学报,2008(04):722-727. |
| [3] | 徐文臣,单德彬,李春峰,吕炎.TA15钛合金的动态热压缩行为及其机理研究[J].航空材料学报,2005(04):10-15,19. |
| [4] | PRASAD Y V R K;GEGEL H L;DORAIVELU S M et al.Modeling of dynamic material behavior in hot deformation:Forging of Ti-6242[J].Metallurgical Transactions A,1984,15(10):1883-1892. |
| [5] | Murty S.V. S. N.;Rao B.N. .Instability criteria for hot deformation of materials[J].International Materials Reviews,2000(1):15-26. |
| [6] | 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. |
| [7] | T. Seshacharyulu;S. C. Medeiros;J. T. Morgan;J. C. Malas;W. G. Frazier;Y. V. R. K. Prasad .Hot deformation and microstructural damage mechanisms in extra-low interstitial (ELI) grade Ti-6Al-4V[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2000(1/2):289-299. |
| [8] | 李淼泉,李晓丽,龙丽,许广兴,于浩,迟彩楼,温国华.TA15合金的热变形行为及加工图[J].稀有金属材料与工程,2006(09):1354-1358. |
| [9] | 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. |
| [10] | Y. V. R. K. Prasad;T. Seshacharyulu .Modelling of hot deformation for microstructural control[J].International Materials Reviews,1998(6):243-258. |
| [11] | VENUGOPAL S;MANNAN S L;PRASAD Y V R K .Optimization of cold and warm.workability in stainless steel type AISI 316L using instability maps[J].Journal of Nuclear Materials,1995,227:1-10. |
| [12] | P.D. NICOLAOU;J.D. MILLER;S.L. SEMIATIN .Cavitation during Hot-Torsion Testing of Ti-6Al-4V[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2005(12):3461-3470. |
| [13] | S.L.Semiatin;R.L.Goetz .Cavitation and failure during hot forging of Ti-6Al-4V[J].Metallurgical and materials transactions. A, physical metallurgy and materials science,1999(5):1411-1424. |
| [14] | 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. |
| [15] | Seshacharyulu T.;Medeiros SC.;Frazier WG.;Prasad YVRK. .Microstructural mechanisms during hot working of commercial grade Ti-6Al-4V with lamellar starting structure[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):112-125. |
| [16] | SEMIATIN S L;LAHOTI G D .Deformation and Unstable flow in hot forging of Ti-6Al-2Sn-4Zr-2Mo-0.1Si[J].Metallurgical Transactions A,1981,12(10):1705-1717. |
| [17] | 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. |
| [18] | Long M.;Rack HJ. .THERMO-MECHANICAL STABILITY OF FORGED TI-26AL-10NB-3V-1MO(AT.PERCENT)[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1995(1):99-111. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%