期刊文献+

Deformability and microstructure transformation of PM TiAl alloy prepared by pseudo-HIP technology 被引量:4

Deformability and microstructure transformation of PM TiAl alloy prepared by pseudo-HIP technology
下载PDF
导出
摘要 Microstructures and deformation properties of Ti-46Al-(Cr,Nb,W,B)alloy consolidated by pseudo-HIP technology were investigated.The results show that the pseudo-HIP temperature has a significant effect on microstructures.When the sintering temperature is 1 100℃,the microstructure of as-pseudo-HIPped alloy is similar to that of the prealloyed powder and the interfaces of these powder particles are still discernible,but a nearγmicrostructure appears in particles.Increasing the pressing temperature to 1 200℃develops successfully a homogeneous and fine-grained duplex microstructure.A typically fully lamellar microstructure with residualβphase is developed at 1 300℃.The compact exhibits excellent deformation properties at elevated temperatures. When the compression temperature is higher than 1 100℃,high quality products without cracks can be obtained even if the engineering compression strain is up to 0.8 at strain rates of 10-2-10-3s-1.It can be established that the mechanical twinning and matrix deformation due to ordinary dislocation slip/climb contribute to the whole hot deformation. Microstructures and deformation properties of Ti-46Al-(Cr,Nb,W,B)alloy consolidated by pseudo-HIP technology were investigated.The results show that the pseudo-HIP temperature has a significant effect on microstructures.When the sintering temperature is 1 100℃,the microstructure of as-pseudo-HIPped alloy is similar to that of the prealloyed powder and the interfaces of these powder particles are still discernible,but a nearγmicrostructure appears in particles.Increasing the pressing temperature to 1 200℃develops successfully a homogeneous and fine-grained duplex microstructure.A typically fully lamellar microstructure with residualβphase is developed at 1 300℃.The compact exhibits excellent deformation properties at elevated temperatures. When the compression temperature is higher than 1 100℃,high quality products without cracks can be obtained even if the engineering compression strain is up to 0.8 at strain rates of 10-2-10-3s-1.It can be established that the mechanical twinning and matrix deformation due to ordinary dislocation slip/climb contribute to the whole hot deformation.
出处 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第4期547-552,共6页 中国有色金属学报(英文版)
基金 Project(1343-74236000008)supported by Hunan Provincial Innovation Foundation for Postgraduate Project(2008AA03A233)supported by the High-tech Research and Development Program of China Project(2007BAE07B05)supported by the National Science and Technology Planed Project of China
关键词 titanium aluminides pseudo-hot isostatic pressing powder metallurgy MICROSTRUCTURE DEFORMABILITY titanium aluminides pseudo-hot isostatic pressing powder metallurgy microstructure deformability
  • 相关文献

参考文献15

  • 1Liu, Y,Huang, BY,He, YH,Wang, JN.Investigation on the Microstructure Homogenization in a TiAl Based Alloy Prepared by Elemental Powder Metallurgy[J].Journal of Materials Science & Technology,1999,15(6):527-530. 被引量:2
  • 2WANG Y H,LIN J P,HE Y H,WANG Y L,CHEN G L.Fabrication and SPS microstructures of Ti-45Al-8.5Nb- (W,B,Y)alloying powders. Intermetallics . 2008
  • 3ZAN X,WANG Y,XIA Y M,HE Y H.Strain rate effect on the tensile behavior of duplex Ti-46.5Al-2Nb-2Cr intermetallics at elevated temperatures. Materials Science Engineering A Structural Materials Properties Microstructure and Processing . 2008
  • 4ZHAO L,BEDDOES J,MORPHY D,WALLACE W.Effect of HIP conditions on the microstructure of a nearγ-TiAl+W powder alloy. Materials and Manufacturing Processes . 1994
  • 5MORRIS-MUOZ M A,MORRIS D G.Microstructure evolution leading to high strains during high temperature deformation of a Ti-Al intermetallic. Intermetallics . 1999
  • 6XU D S,HAO W,RUI Y,PATRICK V.Molecular dynamics investigation of deformation twinning inγ-TiAl sheared along the pseudo-twinning direction. Acta Materialia . 2008
  • 7DLOUHA,KUCHAOVáK,BEZINA J.Dislocation slip and deformation twinning interplay during high temperature deformation inγ-TiAl base intermetallics. Materials Science Engineering A Structural Materials Properties Microstructure and Processing . 2001
  • 8LIU C T,KIM Y W.RT environmental embrittlement in a TiAl alloy. Scripta Metallurgica . 1992
  • 9WANG Y H,LIU J P,HE Y H,WANG Y L,CHEN G L.Microstructures and mechanical properties of Ti-45Al-8.5Nb- (W,B,Y)alloy by SPS-HIP. Materials Science Engineering A Structural Materials Properties Microstructure and Processing . 2008
  • 10WEGMANN G.Temperature induced porosity in hot isostatically pressed gamma titanium aluminide alloy:Powders. Acta Materialia . 2003

共引文献1

同被引文献29

引证文献4

二级引证文献14

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部