冷轧钛管在退火过程中的显微组织与织构演变
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摘要
研究了皮尔格冷轧TA18合金薄壁无缝管在去应力退火过程中显微组织与微织构随保温时间的变化规律。借助电子背散射衍射(EBSD)技术对管材冷轧态以及退火态横截面的微观组织进行重构,从而分析了TA18合金的再结晶行为;并用极图和取向分布函数(ODF)对比了不同条件下管材织构的差别。结果表明:冷轧TA18管在500℃退火过程中,仍处于初次再结晶的形核阶段,组织中大量保留变形特征,极少出现再结晶晶粒。冷轧管中形成的沿横向(TD)倾斜的双峰基面织构,在随后保温过程中,其(0001)晶面织构类型没有发生显著变化;但从ODF特定截面中却发现随保温时间延长的初次再结晶程度增加,还是导致了织构的细微变化,主要是{0001}纤维织构减弱,■纤维织构增强。
The microstructural and textural developments of pilgered TA18 thin-walled seamless tube were investigated after stress-relieving heat treatments with different holding time. Based on electron backscatter diffraction(EBSD) technique, microstructures of the cold-rolled and annealed tubes in transverse cross-section plane were reconstructed to analyze the recrystallization behavior, and texture differences among the materials were compared by pole figure and orientation distribution function(ODF). The results showed that the stress-relieved tubes were still in the nucleation stage of primary recrystallization as most of the deformed microstructure being retained and only a few recrystallized grains being captured. No significant changes were deduced from the pole figure of(0001), but double tilt basal texture along TD plane were found during annealing process. However, further investigation from the detailed ODFs revealed progressive primary recrystallization with increasing holding time, mainly ■ and weakened(0001) fiber to some extent.
The microstructural and textural developments of pilgered TA18 thin-walled seamless tube were investigated after stress-relieving heat treatments with different holding time. Based on electron backscatter diffraction(EBSD) technique, microstructures of the cold-rolled and annealed tubes in transverse cross-section plane were reconstructed to analyze the recrystallization behavior, and texture differences among the materials were compared by pole figure and orientation distribution function(ODF). The results showed that the stress-relieved tubes were still in the nucleation stage of primary recrystallization as most of the deformed microstructure being retained and only a few recrystallized grains being captured. No significant changes were deduced from the pole figure of(0001), but double tilt basal texture along TD plane were found during annealing process. However, further investigation from the detailed ODFs revealed progressive primary recrystallization with increasing holding time, mainly ■ and weakened(0001) fiber to some extent.
引文
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[10] Bayona-Carrillo N,Bozzolo N,Fundenberger J J,Thomas B,Camelin P,Lenarduzzi E,Wagner F.Effect of recrystallization on tensile behavior,texture,and anisotropy of Ti-3Al-2.5V cold pilgered tubes [J].Advanced Engineering Materials,2011,13(5):383.
[11] Wagner F,Bozzolo N,Landuyt O V,Grosdidier T.Evolution of recrystallisation texture and microstructure in low alloyed titanium sheets [J].Acta Materialia,2002,50:1245.
[12] Bozzolo N,Dewobroto N,Grosdidier T,Wagner F.Texture evolution during grain growth in recrystallized commercially pure titanium [J].Materials Science and Engineering A,2005,397:346.
[13] Gerspach F,Bozzolo N,Wagner F.About texture stability during primary recrystallization of cold-rolled low alloyed zirconium [J].Scripta Materialia,2009,60:203.
[14] Tenckhoff E.The development of the deformation Texture in zirconium during rolling in sequential passes [J].Metallurgical Transactions A,1978,9A:1401.
[15] Ballinger R G,Lucas G E,Pelloux R M.The effect of plastic strain on the evolution of crystallographic texture in Zircaloy-2[J].Journal of Nuclear Materials,1984,126:53.
[16] Wang Y N,Huang J C.Texture analysis in hexagonal materials [J].Materials Chemistry and Physics,2003,81:11.
[17] Mani Krishna K V,Sahoo S K,Samajdar I,Neogy S,Tewari R,Dey G K,Gaur Hari Das,Saibaba N,Banarjee S.Microstructural and textural developments during Zircaloy-4 fuel tube fabrication [J].Journal of Nuclear Materials,2008,383:78.
[18] Hiwarkar V D,Sahoo S K,Samajdar I,Narasimhan K,Mani Krishna K V,Dey G K,Srivastava D,Tewari R,Banerjee S.Annealing of cold worked two-phase Zr-2.5Nb-associated microstructural developments [J].Journal of Nuclear Materials,2009,384:30.
[19] Hiwarkar V D,Sahoo S K,Samajdar I,Satpathy A,Mani Krishna K V,Dey G K,Srivastav D,Tewari R,Banarjee S.Defining recrystallization in pilgered Zircaloy-4:from preferred nucleation to growth inhibition [J].Journal of Nuclear Materials,2011,412:287.
[2] Steven E M,John H S.Effect of crystallographic texture on flexure fatigue properties of Ti-3Al-2.5V hydraulic tubing [J].Journal of Testing and Evaluation,1990,18(2):98.
[3] Murty K L,Kishore R,Yan J,Scattergood R O,Helsel A W.Effect of annealing temperature on texture and creep anisotropy in Ti3Al2.5V alloy [J].Materials Science Forum,2005,495-497:1645.
[4] Murty K L,Charit I.Texture development and anisotropic deformation of zircaloys [J].Progress in Nuclear Energy,2006,48:325.
[5] Tenckhoff E.Texture development and anisotropic deformation of zircaloys [J].Journal of ASTM International,2005,2(4):1.
[6] Tenckhoff E,Rittenhouse P L.Annealing textures in zircaloy tubing [J].Journal of Nuclear Materials,1970,35:14.
[7] Luo D C,Nan L,Yang Y S,Yang Y F.Effect of annealing temperature on mechanical properties and microstructure of TA18 tubes [J].Hot Working Technology,2012,41(20):206.(罗登超,南莉,杨亚社,杨永福.退火温度对TA18管材性能和组织的影响 [J].热加工工艺,2012,41(20):206.)
[8] Chen Y,Li J S,Zhang W F,Sun F,Li Y,Tang B.Investigation of the microstructure and texture of TA18 tubes during cold-rolling process [J].Journal of Plasticity Engineering,2012,19(1):35.(陈逸,李金山,张旺峰,孙峰,李艳,唐斌.冷轧TA18管材变形过程中微观组织及织构 [J].塑性工程学报,2012,19(1):35.)
[9] Hong Q,Qi Y L,Zhao B,Du Y.Influence of cold rolling with different values on textures and mechanical properties of high strength TA18 titanium alloy tubes [J].Titanium Industry Progress,2016,33(2):16.(洪权,戚运莲,赵彬,杜宇.不同Q值冷轧对TA18钛合金管材织构及力学性能的影响 [J].钛工业进展,2016,33(2):16.)
[10] Bayona-Carrillo N,Bozzolo N,Fundenberger J J,Thomas B,Camelin P,Lenarduzzi E,Wagner F.Effect of recrystallization on tensile behavior,texture,and anisotropy of Ti-3Al-2.5V cold pilgered tubes [J].Advanced Engineering Materials,2011,13(5):383.
[11] Wagner F,Bozzolo N,Landuyt O V,Grosdidier T.Evolution of recrystallisation texture and microstructure in low alloyed titanium sheets [J].Acta Materialia,2002,50:1245.
[12] Bozzolo N,Dewobroto N,Grosdidier T,Wagner F.Texture evolution during grain growth in recrystallized commercially pure titanium [J].Materials Science and Engineering A,2005,397:346.
[13] Gerspach F,Bozzolo N,Wagner F.About texture stability during primary recrystallization of cold-rolled low alloyed zirconium [J].Scripta Materialia,2009,60:203.
[14] Tenckhoff E.The development of the deformation Texture in zirconium during rolling in sequential passes [J].Metallurgical Transactions A,1978,9A:1401.
[15] Ballinger R G,Lucas G E,Pelloux R M.The effect of plastic strain on the evolution of crystallographic texture in Zircaloy-2[J].Journal of Nuclear Materials,1984,126:53.
[16] Wang Y N,Huang J C.Texture analysis in hexagonal materials [J].Materials Chemistry and Physics,2003,81:11.
[17] Mani Krishna K V,Sahoo S K,Samajdar I,Neogy S,Tewari R,Dey G K,Gaur Hari Das,Saibaba N,Banarjee S.Microstructural and textural developments during Zircaloy-4 fuel tube fabrication [J].Journal of Nuclear Materials,2008,383:78.
[18] Hiwarkar V D,Sahoo S K,Samajdar I,Narasimhan K,Mani Krishna K V,Dey G K,Srivastava D,Tewari R,Banerjee S.Annealing of cold worked two-phase Zr-2.5Nb-associated microstructural developments [J].Journal of Nuclear Materials,2009,384:30.
[19] Hiwarkar V D,Sahoo S K,Samajdar I,Satpathy A,Mani Krishna K V,Dey G K,Srivastav D,Tewari R,Banarjee S.Defining recrystallization in pilgered Zircaloy-4:from preferred nucleation to growth inhibition [J].Journal of Nuclear Materials,2011,412:287.