Study on the thermal deformation behavior and microstructure of FGH96 heat extrusion alloy during two-pass hot deformation
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摘要
The change rules associated with hot deformation of FGH96 alloy were investigated by isothermal two-pass hot deformation tests in the temperature range 1050–1125°C and at strain rates ranging from 0.001 to 0.1 s~(-1) on a Gleeble 3500 thermo-simulation machine. The results showed that the softening degree of the alloy between passes decreases with increasing temperature and decreasing strain rates. The critical strain of the first-pass is greater than that of the second-pass. The true stress–true strain curves showed that single-peak dynamic recrystallization, multi-peak dynamic recrystallization, and dynamic response occur when the strain rate is 0.1, 0.01, and 0.001 s~(-1), respectively. The alloy contains three different grain structures after hot deformation: partially recrystallized tissue, completely fine recrystallized tissue, coarse-grained grains. The small-angle grain boundaries increase with increasing temperature. Increasing strain rates cause the small-angle grain boundaries to first increase and then decrease.
The change rules associated with hot deformation of FGH96 alloy were investigated by isothermal two-pass hot deformation tests in the temperature range 1050–1125°C and at strain rates ranging from 0.001 to 0.1 s~(-1) on a Gleeble 3500 thermo-simulation machine. The results showed that the softening degree of the alloy between passes decreases with increasing temperature and decreasing strain rates. The critical strain of the first-pass is greater than that of the second-pass. The true stress–true strain curves showed that single-peak dynamic recrystallization, multi-peak dynamic recrystallization, and dynamic response occur when the strain rate is 0.1, 0.01, and 0.001 s~(-1), respectively. The alloy contains three different grain structures after hot deformation: partially recrystallized tissue, completely fine recrystallized tissue, coarse-grained grains. The small-angle grain boundaries increase with increasing temperature. Increasing strain rates cause the small-angle grain boundaries to first increase and then decrease.
The change rules associated with hot deformation of FGH96 alloy were investigated by isothermal two-pass hot deformation tests in the temperature range 1050–1125°C and at strain rates ranging from 0.001 to 0.1 s~(-1) on a Gleeble 3500 thermo-simulation machine. The results showed that the softening degree of the alloy between passes decreases with increasing temperature and decreasing strain rates. The critical strain of the first-pass is greater than that of the second-pass. The true stress–true strain curves showed that single-peak dynamic recrystallization, multi-peak dynamic recrystallization, and dynamic response occur when the strain rate is 0.1, 0.01, and 0.001 s~(-1), respectively. The alloy contains three different grain structures after hot deformation: partially recrystallized tissue, completely fine recrystallized tissue, coarse-grained grains. The small-angle grain boundaries increase with increasing temperature. Increasing strain rates cause the small-angle grain boundaries to first increase and then decrease.
引文
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[3]M.J.Zhang,F.G.Li,S.Y.Wang,and C.Y.Liu,Effect of powder preparation technology on the hot deformation behavior of HIPed P/M Nickel-base superalloy FGH96,Mater.Sci.Eng.A,528(2011),No.12,p.4030.
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[6]X.H.Xie,Z.K.Yao,Y.Q.Ning,H.Z.Guo,Y.Tao,and Y.W.Zhang,Dynamic recrystallization and grain refining of superalloy FGH4096,J.Aeronaut.Mater.,31(2011),No.1,p.20.
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[9]Z.G.Wu,D.F.Li,S.L.Guo,Q.M.Guo,and H.J.Peng,Dynamic recrystallization models of GH625 Ni-based superalloy,Rare.Met.Mater.Eng.,41(2012),p.235.
[10]B.Fang,Z.Ji,M.Liu,G.F.Tian,C.C.Jia,T.T.Zeng,B.F.Hu,and Y.H.Chang,Critical strain and models of dynamic recrystallization for FGH96 superalloy during two-pass hot deformation,Mater.Sci.Eng.A,593(2014),p.8.
[11]B.Fang,Z.Ji,M.Liu,G.F.Tian,C.C.Jia,T.T.Zeng,B.F.Hu,and C.C.Wang,Study on constitutive relationships and processing maps for FGH96 alloy during two-pass hot deformation,Mater.Sci.Eng.A,590(2014),p.255.
[12]B.Fang,Z.Ji,G.F.Tian,C.C.Jia,B.F.Hu,and Z.W.Cui,Flow behavior and processing map of FGH96 superalloy during two-pass hot deformation,Chin.J.Eng.,37(2015),No.3,p.336.
[13]D.G.He,Y.C.Lin,M.S.Chen,and L.Ling,Kinetics equations and microstructural evolution during metadynamic recrystallization in a nickel-based superalloy with?phase,J.Alloys Compd.,690(2017),p.971.
[14]Y.C.Lin,Y.X.Liu,M.S.Chen,M.H.Huang,X.Ma,and Z.L.Long,Study of static recrystallization behavior in hot deformed Ni-based superalloy using cellular automaton model,Mater.Des.,99(2016),p.107.
[15]D.G.He,Y.C.Lin,J.Chen,D.D.Chen,J.Huang,Y.Tang,and M.S.Chen,Microstructural evolution and support vector regression model for an aged Ni-based superalloy during two-stage hot forming with stepped strain rates,Mater.Des.,154(2018),p.51.
[16]Y.C.Lin,F.Wu,Q.W.Wang,D.D.Chen,and S.K.Singh,Microstructural evolution of a Ni-Fe-Cr-base superalloy during non-isothermal two-stage hot deformation,Vacuum.,151(2018),p.283.
[2]J.Li and H.M.Wang,Microstructure and mechanical properties of rapid directionally solidified Ni-base superalloy Rene41 by laser melting deposition manufacturing,Mater.Sci.Eng.A,527(2010),No.18-19,p.4823.
[3]M.J.Zhang,F.G.Li,S.Y.Wang,and C.Y.Liu,Effect of powder preparation technology on the hot deformation behavior of HIPed P/M Nickel-base superalloy FGH96,Mater.Sci.Eng.A,528(2011),No.12,p.4030.
[4]M.J.Zhang,F.G.Li,Z.W.Yuan,J.Li,and S.Y.Wang,Effect of heat treatment on the micro-indentation behavior of powder metallurgy nickel based superalloy FGH96,Mater.Des.,49(2013),p.705.
[5]C.Z.Liu,F.Liu,H.Lan,and L.Jiang,Effect of hot extrusion and heat treatment on microstructure of nickel-base superalloy,Trans.Nonferrous Met.Soc.China,24(2014),No.8,p.2544.
[6]X.H.Xie,Z.K.Yao,Y.Q.Ning,H.Z.Guo,Y.Tao,and Y.W.Zhang,Dynamic recrystallization and grain refining of superalloy FGH4096,J.Aeronaut.Mater.,31(2011),No.1,p.20.
[7]Z.H.Yao,J.X.Dong,and M.C.Zhang,Microstructure control and prediction of GH738 superalloy during hot deformation I.Construction of microstructure evolution model,Acta Metall.Sin.,47(2011),p.1581.
[8]P.F.Liu,D.Liu,Z.J.Luo,W.R.Sun,S.R.Guo,and Z.Q.Hu,Flow behavior and dynamic recrystallization model for GH761 superalloy during hot deformation,Rare Met.Mater.Eng.,38(2009),No.2,p.275.
[9]Z.G.Wu,D.F.Li,S.L.Guo,Q.M.Guo,and H.J.Peng,Dynamic recrystallization models of GH625 Ni-based superalloy,Rare.Met.Mater.Eng.,41(2012),p.235.
[10]B.Fang,Z.Ji,M.Liu,G.F.Tian,C.C.Jia,T.T.Zeng,B.F.Hu,and Y.H.Chang,Critical strain and models of dynamic recrystallization for FGH96 superalloy during two-pass hot deformation,Mater.Sci.Eng.A,593(2014),p.8.
[11]B.Fang,Z.Ji,M.Liu,G.F.Tian,C.C.Jia,T.T.Zeng,B.F.Hu,and C.C.Wang,Study on constitutive relationships and processing maps for FGH96 alloy during two-pass hot deformation,Mater.Sci.Eng.A,590(2014),p.255.
[12]B.Fang,Z.Ji,G.F.Tian,C.C.Jia,B.F.Hu,and Z.W.Cui,Flow behavior and processing map of FGH96 superalloy during two-pass hot deformation,Chin.J.Eng.,37(2015),No.3,p.336.
[13]D.G.He,Y.C.Lin,M.S.Chen,and L.Ling,Kinetics equations and microstructural evolution during metadynamic recrystallization in a nickel-based superalloy with?phase,J.Alloys Compd.,690(2017),p.971.
[14]Y.C.Lin,Y.X.Liu,M.S.Chen,M.H.Huang,X.Ma,and Z.L.Long,Study of static recrystallization behavior in hot deformed Ni-based superalloy using cellular automaton model,Mater.Des.,99(2016),p.107.
[15]D.G.He,Y.C.Lin,J.Chen,D.D.Chen,J.Huang,Y.Tang,and M.S.Chen,Microstructural evolution and support vector regression model for an aged Ni-based superalloy during two-stage hot forming with stepped strain rates,Mater.Des.,154(2018),p.51.
[16]Y.C.Lin,F.Wu,Q.W.Wang,D.D.Chen,and S.K.Singh,Microstructural evolution of a Ni-Fe-Cr-base superalloy during non-isothermal two-stage hot deformation,Vacuum.,151(2018),p.283.