研究了B含量分别为0.2％和1.0％(原子分数)两种TiAl合金中TiB2相的生长机制,结果表明G2(Ti-47.5Al-5( Cr,Nb,W,Si)+1.0B％)合金中少量TiB2相是由于成分起伏从液相中生成的初生块状TiB2相,大部分TiB2相是在凝固过程与β相共同耦合生长的次生带状、杆状TiB2相；G1( Ti-47.5Al-5( Cr,Nb,W,Si)+0.2B％)合金中TiB2相是由共晶反应生成的次生带状TiB2相.G2合金全片层组织和网篮组织室温塑性均优于G1合金,网篮组织室温强度与Gt合金相当,而全片层组织室温强度却不如G1合金.在760 ℃/100 MPa/200 h蠕变条件下G2合金全片层组织残余蠕变量和蠕变速率均低于G1合金.
参考文献
| [1] | Murray J L;Massalski T B.Phase Diagrams of Binary Titanium Alloys[M].Am.Soc.Metals,Metals Park,Ohio,1986:12. |
| [2] | Craef M De;Hardwick Dallis A;Martin Patrick L.Structural evolution of titanium di-borides in wrought Ti-47at％ Al-2Mo-0.2at％B[A].Warrendale,Pennsylvania:TMS,1997:185. |
| [3] | Hyman M E;Mccullough C;Levi C G;Mehrabian R .Evolution of boride morphologies in TiAl-B alloys[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1991,22A(07):1647. |
| [4] | Pu Z J;Wu Kuang-His .Investigation of boron distribution in a TiAl-based alloy using particle-tracking[J].Scripta Metallurgica et Materialia,1996,34(01):169. |
| [5] | 张虎,高文理,张二林,曾松岩.Ti-54Al-xB合金中TiB2的形貌演变及生长机理[J].金属学报,2002(07):699-702. |
| [6] | Hyman M E;McCullough C;Valencia J J;Levi C G Mehrabian R .Microstructure evolution in TiAl alloys with B additions:conventional solidification[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1989,20(09):1847. |
| [7] | 李臻熙 .TiAl基合金组织控制对力学性能的影响[D].北京航空材料研究院,2000. |
| [8] | 李臻熙,曹春晓.Ti-48Al+B合金中硼化物的生长机理[J].稀有金属材料与工程,2001(01):19-22. |
| [9] | 李臻熙,曹春晓.微量元素B对Ti-48Al合金组织细化的影响[J].材料工程,2000(03):17-21. |
| [10] | 董利民,崔玉友,杨锐.B和C对铸造TiAl基合金宏观和显微组织的影响[J].金属学报,2002(06):643-646. |
| [11] | 高文理,张虎,张二林,曾松岩.TiAl-B合金中初生TiB2晶体的表面形貌和形成机制[J].材料科学与工艺,2002(04):387-390. |
| [12] | 张虎,高文理,张二林,曾松岩.TiAlB合金中初生TiB2的形貌及其形成机理[J].北京航空航天大学学报,2002(05):540-542. |
| [13] | Inkson B J;Boothroyd C B;Humphreys C J .Botide morphologyinA (Fe,V,B) Ti-alloy containing B2-phase[J].Acta Metallurgica Et Materialia,1995,43(04):1429. |
| [14] | Godfrey A B;Loretto M H .The nature of complex precipitates associated with the addition of boron to a γ-based titanium aluminide[J].Intermetallics,1996,4(01):47. |
| [15] | Chen G L;Zhang W J;Wang Y D;Wang J G,Sun Z Q.TiAl-Nb intermetallic alloys based on the ternary intermetallic compound[A].Warrendale,Pennsylvania:TMS,1993:319. |
| [16] | 谭家骏.金属材料及热处理专业知识解答[M].北京:国防工业出版社,1997 |
| [17] | Kim Young-won;Dimiduk Dennis M .Method to produce gamma titanium aluminide articles having improved properties[P].United States Patent:5226985,1993. |
| [18] | 齐立春 .TiB2/TiAl复合材料组织与力学性能关系研究[D].北京:北京航空材料研究院,2005. |
| [19] | Dimiduk Dennis M;Hazzledine Peter M;Parthasarathy Triplicane A;Seshagari S,Mendiratta Madan G .The role of grain size and selected microstructural parameters in strengthening fully lamellar TiAl alloys[J].Metallrugical and Materials Transactions A,1998,29(01):37. |
| [20] | H. JIANG;T.S. RONG;D. HU .Thermal cycling of Ti46Al8Nb1B[J].Intermetallics,2006(12):1433-1447. |
| [21] | Akio Hirose;Mitsuo Hasegawa;Kojiro F Kobayashi .Microstructures and mechanical properties of TiB2 particle reinforced TiAl composites by plasma arc melting process[J].Materials Science and Engineering A,1997,239-240(01):46. |
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%