Transactions of Materials and Heat Treatment

Title：Study on high-temperature constitutive relationship of Ti-46.5Al-2.5V-1.0Cr-0.3Ni alloy

Authors： SI Jia-yong1 2 HAN Peng-biao1 ZHANG Ji1(1.High Temperature Material Researd Division Central Iron and Steel Research Institute Beijing 100081 China 2.Institude of Materials Processing Technology Central South University of Forestry and Technology Changsha

Unit：

KeyWords： TiAl alloy hot deformation deformation active energy constitutive relationship

ClassificationCode：TG316

year,vol(issue):pagenumber：2009,34(5):121-125

Abstract：

The high temperature behavior of Ti-46.5Al-2.5V-1.0Cr-0.3Ni was studied by isothermal compression test at Gleeble-1500 thermal-mechanical simulator.The test conditions were T=1000-1200℃,=0.001-1.0s-1 and ε=70%.Based on the corrected stress-strain curves,the influence of processing parameters on the flow stress was studied.Furthermore,the constitutive relationship of TiAl alloy was researched.The results show that the flow stress decreases with the increase of deforming temperature,while increases with the raise of strain rate.The deformation active energy was calculated and the flow stress constitutive equation during compression was obtained.

Funds：

“863”国家高技术研究发展计划(2006AA03A204)

Reference：

[1]Semiatin S L,Seetharaman V,Jain V K.Microstructure de-velopment during conventional andisothermal hot forging of anear-gamma titanium aluminide[J].Metall.&Mater.Trans.A,1994,25A(12):2753-2768.
[2]Liu C T,Schneibel J H,Maziasz P J.Tensile properties andfracture toughness of Ti Al alloys with controlled microstruc-tures[J].Intermetallics,1996,(4):429-440.
[3]Ki m Y W.Strength and ductilityin Ti Al alloys[J].Interme-tallics,1998,(6):623-628.
[4]Semiatin S L,Chesnutt J C,Austin C,et al.Aircraft engineapplications for gamma titanium aluminide[A].Nathal MV,Darolia R,Liu C T,et al.Structural Intermetallics[C].TMS,Warrendale:PA,1997.
[5]Seetharaman V,Semiatin S L.Plastic-flow and microstruc-ture evolution during hot deformation of a gamma titaniumaluminide alloy[J].Metall.&Mater.Trans.A,1997,28A(11):2309-2321.
[6]Appel F,Brossmann U,Christoph U.Recent progressin thedevelopment of gamma titanium[J].Advanced EngineeringMaterials,2000,2(11):699-720.
[7]Karhausen K,Kopper R.Model for integrated process andmicrostructure si mulation in hot forming[J].SteelReasearch,1992,63(6):247-271.
[8]Robert W.Dynamic changes that occur during hot workingand their significance regarding microstructural developmentand hot workability[A].Krauss G.Deformation,process-ing and structure[C].OH:ASM,1984.
[9]Nobuki M,Tsujumoto T.Influence of alloy composition onhot deformation properties of Ti-Al binaryintermetallics[J].ISIJ Inter.,1991,(31):931-937.

Service：

【This site has not yet opened Download Service】【Add Favorite】