利用金相观察、热模拟技术及扫描电子显微术(SEM)研究了Fe-40％ Ni合金在含Ti及无Ti条件下的高温应力-应变行为及变形后的应力弛豫行为,并观察了锻造样品中TiN颗粒的形态.实验结果显示:含Ni 40％的Fe-Ni合金在室温下保持了奥氏体组织,并有孪晶出现.在800～950℃范围内变形时只发生动态回复,1000℃以上变形时发生了动态再结晶.在Ti存在的情况下,变形温度达到1150℃时才发生动态再结晶.IF钢的模拟结果与不含Ti的Fe-40Ni合金呈现类似的趋势.由于TiN的应变诱导析出,明显延缓了变形后等温过程中的应力松弛速率.
参考文献
| [1] | Keesam Shin;Thomas F. Kelly .Effect of RSP and NbC addition on microstructural evolution of Fe-40wt.%Ni alloys[J].Scripta materialia,2002(12):839-844. |
| [2] | A. ABDOLLAH-ZEDEH;D. P. DUNNE .Effect of Nb on Recrystallization After Hot Deformation in Austenitic Fe-Ni-C[J].ISIJ International,2003(8):1213-1218. |
| [3] | Adachi Y;Tomida T;Hinotani S .Dislocation substructure in hot-deformed Ni-based alloy:Simulation for structure evolution of hot-worked austenite in low carbon steel[J].ISIJ International,2000,40:S194. |
| [4] | Ducki KJ.;Rodak K.;Hetmanczyk M.;Kuc D. .Subgrain and dislocation structure changes in hot-deformed high-temperature Fe-Ni austenitic alloy[J].Materials Chemistry and Physics,2003(2/3):493-495. |
| [5] | Shaoqiang Yuan;Shanwu Yang;Wenjin Nie .Change in dislocation configuration of deformed Fe-Ni-Nb-Ti-C-B alloy during stress relaxation[J].Journal of University of Science and Technology Beijing,2003(3):76-78. |
| [6] | Joonoh Moon;Joobong Lee;Changhee Lee .Coarsening kinetics of TiN particles in a low alloyed steel in weld HAZ:Considering critical particle size[J].Acta Materialia,2006,54:1053. |
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