利用Gleeble-1500热模拟实验机对非真空熔铸Cu-0.94Cr-0.34Zr合金进行高温热压缩变形,研究在变形温度为500～800℃、应变速率为0.01 ～1 s-1工作条件下该合金的流变应力行为,建立合金热变形流变应力本构方程及加工图.结果表明:流变应力随变形温度的升高而降低,随应变速率的降低而减小；可用包含Zener-Hollomon参数的Arrhenius双曲正弦关系式描述Cu-0.94Cr-0.34Zr合金的热变形行为,建立本构方程,算出其激活能为418.35 kJ/mol.依据动态材料模型,建立热加工图,确定热变形失稳区和安全热加工区域,合金最佳热加工条件为:变形温度775℃,应变速率0.01s-1.
参考文献
| [1] | Su JH;Dong QM;Liu P;Li HJ;Kang BX .Research on aging precipitation in a Cu-Cr-Zr-Mg alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):422-426. |
| [2] | 刘平;赵冬梅;田保红.高性能铜合金及其加工技术[M].北京:冶金工业出版社,2005 |
| [3] | 贾淑果,刘平,宋克兴,郑茂盛,田保红,周根树.Cu-Ag-Zr合金的时效性能[J].材料热处理学报,2010(09):37-40. |
| [4] | 张旦闻,刘宏昭,董企铭,刘平.Cu-3.2Ni-0.75Si合金时效析出行为研究[J].材料热处理学报,2004(04):28-32. |
| [5] | Perez-Prado M T;Del Valle J A;Contreras J M et al.Microstructural evolution during large strain hot rolling of a AM60 Mg alloy[J].Scripta Materialia,2004,50:661-665. |
| [6] | 寇琳媛,金能萍,张辉,韩逸,吴文祥,李落星.7150铝合金高温热压缩变形流变应力行为[J].中国有色金属学报,2010(01):43-48. |
| [7] | 何振波,李慧中,梁霄鹏,尹志民.Al-Zn-Mg-Sc-Zr合金的热变形行为及加工图[J].中国有色金属学报,2011(06):1220-1228. |
| [8] | 李展志,李慧中,王海军,梁霄鹏,曾敏,刘楚明.6069铝合金的热变形行为和加工图[J].粉末冶金材料科学与工程,2011(02):155-161. |
| [9] | Poirier J P.晶体的高温塑性变形[M].大连:大连理工大学出版社,1988:42-43. |
| [10] | Puhci E S;Staia M H .High-temperature deformation of commercial-purity aluminum[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1998,29(09):2345-2359. |
| [11] | Sellars C M;Mctegart W J .On the mechanism of hot deformation[J].Acta Metallurgica,1966,14:1136-1138. |
| [12] | Samantaray, D.;Mandal, S.;Phaniraj, C.;Bhaduri, A.K. .Flow behavior and microstructural evolution during hot deformation of AISI Type 316 L(N) austenitic stainless steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(29/30):8565-8572. |
| [13] | Prasad Y V R K;Sasidhara S.Hot Working Guide:A Compendium of Processing Maps[M].Materials Park,OH:ASM Inernational,1997:23-29. |
| [14] | Bozzini B.;Cerri E. .Numerical reliability of hot working processing maps[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):344-347. |
| [15] | Prasad Y V R K;Seshscharyulu T .Modelling of hot deformation for microstructure control[J].International Materials Reviews,1998,43(06):243-258. |
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