Ti-62A alloy plates with three different types of microstructure,fully equiaxed,bimodal,and Widmanst(a)tten,were obtained by various heat treatments to investigate the effects of microstructure on the tensile and fracture properties at room temperature.The results reveal that Widmanst(a)tten microstructure exhibits good damage tolerance behavior considering strength,fracture toughness,and fatigue crack growth behavior,while the bimodal microstructure shows good comprehensive properties considering the plasticity synthetically.Optical microscopy (OM) and scanning electron microscopy (SEM) microstructure analyses on fracture and fatigue crack path demonstrate that the dependence of mechanical properties and fatigue crack growth behavior on microstructural feature are attributed to the α lamellae width and the α colony size.
参考文献
| [1] | Cao C.X .Change of material selection criterion and development of high damage-tolement titanium alloy[J].Acta Metallurgica Sinica,2002,38(Suppl):4. |
| [2] | Brewer WD.;Wallace TA.;Bird RK. .Titanium alloys and processing for high speed aircraft[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):299-304. |
| [3] | Sadananda K;Vasudevan A.K .Fatigue crack growth behavior of titanium alloys[J].International Journal of Fatigue,2005,27(10-12):1255. |
| [4] | Fu Y.Y;Song Y.Q;Hui S.X;Mi X.J .Research and application of typical aerospace titanium allloys[J].Chinese J Rare Met,2006,30(06):850. |
| [5] | LI Shikai,XIONG Baiqing,HUI Songxiao.Effects of cooling rate on the fracture properties of TA15 ELI alloy plates[J].稀有金属（英文版）,2007(01):33-38. |
| [6] | Wood JR.;Welter MF.;Crist EM.;Russo PA. .Thermomechanical processing and heat treatment of Ti-6Al-2Sn-2Zr-2Cr-2Mo-Si for structural applications[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1998(1/2):109-118. |
| [7] | 于洋,惠松骁,叶文君,王希哲,张翥.热处理对Ti-Al-Sn-Zr-Mo-Si-X系合金性能的影响[J].金属热处理,2005(12):68-71. |
| [8] | YU Yang,HUI Songxiao,YE Wenjun,XIONG Baiqing.Mechanical properties and microstructure of an α+β titanium alloy with high strength and fracture toughness[J].稀有金属（英文版）,2009(04):346-349. |
| [9] | Sun M;Ye W.J;Hui S.X;Yu Y .Effects of heat treatment on microstructures and tensile properties of Ti-62A alloy plate[J].The Chinese Journal of Nonferrous Metals,2010,20(Special 1):s681. |
| [10] | Lütjering G.Titanium[M].New York:springer-verlag,2003:218. |
| [11] | Niinomi M;Kobayashi T .and Sasaki N.Toughness and microstructural factors of Ti-6Al-4V alloy[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1988,100(1-2):45. |
| [12] | LIU Rui,HUI Songxiao,YE Wenjun,XIONG Baiqing,YU Yang,FU Yanyan.Dynamic fracture toughness of TA15ELI alloy studied by instrumented impact test[J].稀有金属（英文版）,2010(06):608-612. |
| [13] | Niinomi M .and Kobayashi T,Fracture characteristics analysis related to the microstructures in titanium alloys[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,1996,213(1-2):16. |
| [14] | Lütjering G .Influence of processing on microstructure and mechanical properties of (α+β) titanium alloys[J].Materials Science and Engineering A,1998,243(1-2):32. |
| [15] | Peters J.O;Lütjering G .Comparison of the fatigue and fracture of(α+β)and β titanium alloys[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,2001,32(11):2805. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%