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Al含量和冷速对TiAl合金全片层组织热稳定性的影响 被引量：1

Effect of Al Content and Cooling Rate on Thermal Stability of Fully Lamellar Microstructures in TiAl Alloys
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摘要 研究A l含量和冷却速率对TiA l合金全片层组织在1150℃的热稳定性的影响。研究表明,A l含量在46 at%~48 at%范围的二元TiA l合金的A l含量越高,γ偏析程度越严重,铸造片层组织的热稳定性越差。Ti-48A l合金α单相区固溶处理后炉冷的粗片层组织的稳定性远远优于空冷的细片层组织,空冷细片层组织容易在晶界处发生不连续粗化转变,并且空冷片层晶粒内的魏氏片层(LW)与基体的界面往往与晶界一同成为片层组织发生分解的起始部位。 The effects of Al content and continuous cooling rate on thermal stability of fully lamellar(FL) microstructure in TiAl alloys at 1150℃ were investigated.For the binary TiAl alloys with 46at%~48at%Al,the higher the Al content is,the more serious the γ dendritic segregation is and the less stable of as-cast FL microstructure is.The thermal stability of coarse lamellar microstructure in Ti-48Al alloy formed by furnace cooling from the α single phase field is superior to that of fine lamellar microstructure fo...
作者 李臻熙 齐立春 黄旭 曹春晓
机构地区 北京航空材料研究院
出处 《航空材料学报》 EI CAS CSCD 2006年第3期66-70,共5页 Journal of Aeronautical Materials
关键词 TIAL合金 全片层组织 热稳定性 不连续粗化 TiAl alloy fully lamellar microstructure thermal stability discontinuous coarsening
分类号 TG113.1 [金属学及工艺—物理冶金]
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参考文献13

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同被引文献14

  • 1许正芳,徐向俊,林均品,张勇,王艳丽,林志,陈国良.热处理对大尺寸铸态高Nb-TiAl合金组织中S-偏析的影响[J].航空材料学报,2007,27(3):28-32. 被引量：12
  • 2Tetsui T. Development of a TiAI turbocharger for passenger vehicles [J]. Material Science and Engineering, 2002, A329-331:582.
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  • 6Zhang J, Fe D, Zhong Z Y, et al. Intermetallics as substitutes for superalloys [J]. Acta Metallurgica Sinica(English Letters). 2005, 18(4): 463.
  • 7Muellquer J, Oeheing M, Appel F, et al. Effects of Hf on the microstrueture and mechanical properties of TiAl-based alloys [J]. Materials Science Forum, 2007, 539(8): 1501.
  • 8Appel F, Christoph U, Oehring M. Creep deformation in two phase titanium aluminide alloys [J]. Materials Science and Engineering, 2002, A329-A331:780.
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航空材料学报
2006年 第3期

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