采用Gleeb-3500热模拟实验机,对再结晶态YZM(Mo-0.39Ti-0.093Zr-0.017C)合金的热变形特征进行了研究.试样用粉末冶金的方法制备,经过70%变形量的高温锻造,然后分别在1100,1200,1300,1400,1500和1600℃的温度下退火,观察了TZM合金的再结晶过程.热模拟实验在1200℃的温度下进行,应变速率为0.1 s-1,变形量为30%,得到了压缩过程的真应力-应变曲线.研究结果表明.TZM合金的硬度随着退火温度的升高而显著降低,且下降的速率为0.13(HV/℃),1600℃退火后,晶粒已经充分长大,再结晶完成,TZM合金明显变软;完全再结晶后的TZM合金在1200℃下热压缩变形,当应变量小于5%时,应力随着应变的增加而迅速增加,加工硬化现象明显;当应变量大于5%时,应力随着应变的增加而缓慢增加,加工硬化速率降低.
参考文献
| [1] | 吴新光,杜晓斌.TZM合金及其特性[J].中国钼业,2005(05):30-31. |
| [2] | 莫尔古诺娃H H.钼合金[M].北京:冶金工业出版社,1984 |
| [3] | 向铁根.钼冶金[M].长沙:中南大学出版社,2002 |
| [4] | 张启修;赵秦生.钨钼合金[M].北京:冶金工业出版社,2005 |
| [5] | Eck R;Pink E .Effects of working on strength and ductility of molybdenum and tungsten alloys[J].International Journal of Refractory Metals and Hard Materials,1992,11:337. |
| [6] | Miller M K;Kenik E A;Mousa M S;Russell K F Bryhan A J .Improvement in the ductility of molybdenum alloys due to grain boundary segregation[J].Scripta Materialia,2002,46:299. |
| [7] | T. Mrotzek;A. Hoffmann;U. Martin .Hardening mechanisms and recrystallization behaviour of several molybdenum alloys[J].International Journal of Refractory Metals & Hard Materials,2006(4):298-305. |
| [8] | Briggs Janet Z;Barr R Q .Arc-cast molybdenum-base TZM alloy:properties and applications[J].High Temperature and High Pressure,1971,3:363. |
| [9] | Filacchioni G.;Casagrande E.;De Angelis U.;De Santis G.;Ferrara D. .Effects of strain rate on tensile properties of TZM and Mo-5%Re[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2002(Pt.a):705-709. |
| [10] | Filacchioni G;Casagrande E;Angelis U De;Santis C De Ferra-ra D .Tensile and impact properties of TZM and Mo-5% Re[J].Journal of Nuclear Materials,1994,212-215(02):1288. |
| [11] | Cockeram B V .The mechanical properties and fracture mechanisms of wrought low carbon arc cast(LCAC),molybdenum-0.5pct titanium-0.1 pet zirconium(TZM),and oxide dispersion strengthened(ODS)molybdenum flat products[J].Materials Science and Engineering,2006,418(1-2):120. |
| [12] | Maday M F .Low cycle fatigue behaviour of TZM molybdenum alloy in divertor water coolant[J].Journal of Nuclear Materials,1996,233-237(02):1397. |
| [13] | A.P. Alur;K.S. Kumar .Monotonic and cyclic crack growth response of a Mo-Si-B alloy[J].Acta materialia,2006(2):385-400. |
| [14] | S. Majumdar;R. Kapoor;S. Raveendra;H. Sinha;I. Samajdar;P. Bhargava;J.K. Chakravartty;I.G. Sharma;A.K. Suri .A study of hot deformation behavior and microstructural characterization of Mo-TZM alloy[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2009(3):545-551. |
| [15] | 胡赓祥;蔡珣.材料科学基础[M].上海:上海交通大学出版社,2005:167. |
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