Inconel 718合金锻造压气机盘件的残余应力及显微组织特征（英文）
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摘要
残余应力对商用发动机Inconel 718材料构件的疲劳性能、可靠性与耐久性起着重要作用,但由于中国中子衍射测量设备与测量经验与标准的缺乏,压气机盘件的系统性残余应力研究鲜见报导。采用X射线与中子衍射分别测量Inconel 718锻造盘件的表面及内部残余应力,采用扫描电子显微镜与透射电子显微镜观察锻造显微组织特征。锻造盘件表面呈压残余应力,内部为拉残余应力,且相比于锻造产生的残余应力,盘件表面的残余应力受粗加工影响较大。位错密度随距盘件表面的距离减小而增高,残余应力会加速位错产生与动态再结晶。
Residual stress plays an important part in fabricating commercial aero engine Inconel 718 components for their fatigue properties, reliability and durability. Due to the limitation of Chinese neutron diffraction instrument and lack of test practice and specifications, there is little systematic research on the residual stress of forged compressor disc. X-ray diffraction and neutron diffraction methods were used to measure the residual stress of Inconel 718 forged discs at the surface and in the interior, respectively. Scanning electron microscope and transmission electron microscope were used to characterize the microstructural features. The residual stress state at the disc is in near-surface compression, balanced by tension within the disc core. However, the surface residual stress of disc depends more on the rough machining than on the forging process. Also, the dislocation densities increase with decreasing distance to the surfaces of disc, and the residual stress accelerates dislocation generation and dynamic recrystallization.
Residual stress plays an important part in fabricating commercial aero engine Inconel 718 components for their fatigue properties, reliability and durability. Due to the limitation of Chinese neutron diffraction instrument and lack of test practice and specifications, there is little systematic research on the residual stress of forged compressor disc. X-ray diffraction and neutron diffraction methods were used to measure the residual stress of Inconel 718 forged discs at the surface and in the interior, respectively. Scanning electron microscope and transmission electron microscope were used to characterize the microstructural features. The residual stress state at the disc is in near-surface compression, balanced by tension within the disc core. However, the surface residual stress of disc depends more on the rough machining than on the forging process. Also, the dislocation densities increase with decreasing distance to the surfaces of disc, and the residual stress accelerates dislocation generation and dynamic recrystallization.
引文
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[19]PANG J W L,HOLDEN T M,MASON T E.In situ generation of intergranular strains in an Al7050 alloy[J].Acta Materialia,1998,46:1503-1518.
[20]DAYMOND M R,BONNER N W.Lattice strain evolution in IMI834 under applied stress[J].Materials Science&Engineering A,2003,340:272-280.
[21]LIN K P,PANG S D.The influence of thermal residual stresses and thermal generated dislocation on the mechanical response of particulate-reinforced metal matrix nanocomposites[J].Composites Part B,2015,83:105-116.
[22]LEE H T,HOU W H.Development of fine-grained structure and the mechanical properties of nickel-based Superalloy 718[J].Materials Science&Engineering A,2012,555:13-20.
[2]CLAUSEN B,BROWN D W,NOYAN I C.Engineering applications of time-of-flight neutron diffraction[J].Journal of Metals,2012,64:117-126.
[3]PIERRET S,EVANS A,PARADOWSKA A M,KAESTNER A,JAMES J,ETTER T,SWYGENHOVEN V H.Combining neutron diffraction and imaging for residual strain measurements in a single crystal turbine blade[J].NDT&E International,2012,45:39-45.
[4]SKOURAS A,PARADOWSKA A,PEEL M J,FLEWITT P E J,PAVIER M J.Residual stress measurements in a ferritic steel/In625superalloy dissimilar metal weldment using neutron diffraction and deep-hole drilling[J].International Journal of Pressure Vessels and Piping,2013,101:143-153.
[5]WOO W,AN G B,KINGSTON E J,DEWALD A T,SMITH D J,HILL M R.Through-thickness distribution of residual stresses in two extreme heat-input thick welds:A neutron diffraction,contour method and deep hold drilling study[J].Acta Materialia,2013,61:3564-3574.
[6]JEONG J S,WOO W,OH K H,KWON S K,KOO Y M.In situ neutron diffraction study of the microstructure and tensile deformation behavior in Al-added high mangancese austenitic steels[J].Acta Materialia,2012,60:2290-2299.
[7]TIN S,LEE P D,KERMANPUR A,MCLEAN M,RIST M.Integrated modeling for the manufacture of Ni-based superalloy discs from solidification to final heat treatment[J].Metallurgical and Materials Transactions A,2005,36:2493-2504.
[8]RIST M A,JAMES J A,TIN S,RODER B A,DAYMOND M R.Residual stresses in a quenched superalloy turbine disc:Measurements and modeling[J].Metallurgical and Materials Transactions A,2006,37:459-467.
[9]CIHAK U,STOCKINGER M,STARON P,TOCKNER J,CLEMENS H.Characterization of residual stresses in compressor discs for aeroengines:Neutron diffraction and finite element simulations[C]//TMS.Pennsylvania:2005:517-526.
[10]DYE D,CONLON K T,REED R C.Characterization and modeling of quenching-induced residual stresses in the nickel-based superalloy IN718[J].Metallurgical and Materials Transactions A,2004,35:1703-1713.
[11]Association Fran?aise de Normalisation.XP CEN ISO/TS21432:2008 non-destructive testing:Standard test method for determining of residual stresses by neutron diffraction[S].2008.
[12]DING Han-hui,HE Guo-ai,WANG Xin,LIU Feng,JIANG Liang.Effect of cooling rate on microstructure and tensile properties of powder metallurgy Ni-based superalloy[J].Transactions of Nonferrous Metals Society of China,2018,28:451-460.
[13]HAN Yin-ben,XUE Xiang-yi,ZHANG Tie-bang,HU Rui,LIJin-shan.Effect of hot compression on carbide precipitation behavior of Ni-20Cr-18W-1Mo superalloy[J].Transactions of Nonferrous Metals Society of China,2016,26:2883-2891.
[14]ANDERSON M,THIELIN A L,BRIDIER F,BOCHER P,SAVOIE J.δphase precipitation in Inconel 718 and associated mechanical properties[J].Materials Science&Engineering A,2017,679:48-55.
[15]ZHANG Hong-jun,LI Chong,LIU Yong-chang,GUO Qian-ying,HUANG Yuan,LI Hui-jun,YU Jian-xin.Effect of hot deformation onγ"andδphase precipitation of Inconel 718 alloy during deformation and isothermal treatment[J].Journal of Alloys and Compounds,2017,716:65-72.
[16]ROLPH J,IQBAL N,HOFFMAN M,EVANS A,HARDY M C,GLAVICIC M G.The effect of d0 reference value on a neutron diffraction study of residual stress in aγ/γ′nickel-base superalloy[J].Journal of Strain Analysis,2013,48:219-228.
[17]SUNDARARAMAN M,MUKHOPADHYAY P,BANERJEE S.Some aspects of the precipitation of metastable intermetallic phases in Inconel 718[J].Metallurgical and Materials Transactions A,1992,23:2015-2028.
[18]WLODEK S T,FIELD R D.The effects of long time exposure on alloy 718[C]//Superalloys.Pennsylvania,1994:659-670.
[19]PANG J W L,HOLDEN T M,MASON T E.In situ generation of intergranular strains in an Al7050 alloy[J].Acta Materialia,1998,46:1503-1518.
[20]DAYMOND M R,BONNER N W.Lattice strain evolution in IMI834 under applied stress[J].Materials Science&Engineering A,2003,340:272-280.
[21]LIN K P,PANG S D.The influence of thermal residual stresses and thermal generated dislocation on the mechanical response of particulate-reinforced metal matrix nanocomposites[J].Composites Part B,2015,83:105-116.
[22]LEE H T,HOU W H.Development of fine-grained structure and the mechanical properties of nickel-based Superalloy 718[J].Materials Science&Engineering A,2012,555:13-20.