在β锻TA15两相钛合金中的变形带

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Bibliographic Details
Published in中国有色金属学报：英文版 Vol. 27; no. 11; pp. 2390 - 2399
Main Author 樊晓光;曾祥;杨合;高鹏飞;孟淼;左瑞;雷鹏辉
Format Journal Article
LanguageEnglish
Published 2017
Subjects
TA15钛合金;β锻;变形带;晶粒细化;动态再结晶
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Bibliography:TA15 titanium alloy; β working; deformation banding; grain refinement; dynamic recrystallization
43-1239/TG
To study deformation banding inβworking of TA15titanium alloy,hot simulation compression experiments were carried out on a Gleeble3500thermal simulator,and the microstructure was investigated by optical microscopy(OM)and electron backscattered diffraction(EBSD).It is found that inβworking of TA15titanium alloy,deformation banding is still an important grain refinement mechanism up to temperature as high as0.7Tm(Tm is the melting temperature).Boundaries of deformation bands(DBBs)may be sharp or diffusive.Sharp DBBs retard discontinuous dynamic recrystallization(DDRX)by prohibiting nucleation,while the diffusive ones are sources of continuous dynamic recrystallization(CDRX).Deformation banding is more significant at high strain rate and large initial grain size.The average width of grain subdivisions is sensitive to strain rate but less affected by temperature and initial grain size.Multi-directional forging which produces crossing DDBs is potential to refine microstructure of small-size forgings.
ISSN:1003-6326