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Influences of Thermal Martensites and Grain Orientations on Strain-induced Martensites in High Manganese TRIP/TWIP Steels
Alternative TitleInfluences of Thermal Martensites and Grain Orientations on Strain-induced Martensites in High Manganese TRIP/TWIP Steels
Lui Fayun1; Yang Ping1; Meng Li1; Cui Fenge1; Ding Hua2
2011
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
ISSN1005-0302
Volume27Issue:3Pages:257-265
AbstractStrain-induced martensites in high manganese TRIP/TWIP steels were investigated in the presence of thermal martensites and under the influence of austenitic grain orientation by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electron backscattered diffraction (EBSD). Before deformation, the morphology of alpha'-M depended mainly on the number of variants and growing period. Regardless of martensite morphologies and deformation, the Kurdjumov-Sachs (K-S) orientation relationships always maintained. The 6 alpha'-M variants formed from a plate of epsilon-M were of 3 pairs of twins with a common axis (alpha') parallel to the normal of {111}(gamma) habit plane to minimize transformation strain. When alpha'-M could be formed only by deformation, it nucleated at the intersection of e-M variants and grew mainly in thick epsilon-M plates. Thick epsilon plates promoted significantly the alpha'-M and weakened the influence of grain orientations. During tension, the transformation in -oriented grains was observed to be slower than that in -oriented grains. Deformation twins promoted epsilon-M formation slightly and had no apparent effect on alpha'-M. Deformation increased the number of epsilon-M variants, but reduced that of alpha'-M variants.
Other AbstractStrain-induced martensites in high manganese TRIP/TWIP steels were investigated in the presence of thermal martensites and under the influence of austenitic grain orientation by X-ray diffraction(XRD),scanning electron microscopy(SEM) and electron backscattered diffraction(EBSD).Before deformation,the morphology of α’-M depended mainly on the number of variants and growing period.Regardless of martensite morphologies and deformation,the Kurdjumov-Sachs(K-S) orientation relationships always maintained.The 6 α-M variants formed from a plate of ε-M were of 3 pairs of twins with a common axis _(α’) parallel to the normal of {111}_γ habit plane to minimize transformation strain.When α’-M could be formed only by deformation,it nucleated at the intersection of ε-M variants and grew mainly in thick ε-M plates.Thick ε plates promoted significantly the α’-M and weakened the influence of grain orientations.During tension,the transformation in -oriented grains was observed to be slower than that in -oriented grains.Deformation twins promoted ε-M formation slightly and had no apparent effect on α’-M.Deformation increased the number of ε-M variants,but reduced that of α’-M variants.
KeywordPLASTIC-DEFORMATION EPSILON-MARTENSITE TRANSFORMATION GAMMA ENERGY PHASE High manganese steel Martensite TRIP effect Orientation relationship Electron backscattered diffraction (EBSD)
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China] ; [Specialized Research Fund for the Doctoral Program of Higher Education]
CSCD IDCSCD:4410775
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/151844
Collection中国科学院金属研究所
Affiliation1.中国科学技术大学
2.中国科学院金属研究所
Recommended Citation
GB/T 7714
Lui Fayun,Yang Ping,Meng Li,et al. Influences of Thermal Martensites and Grain Orientations on Strain-induced Martensites in High Manganese TRIP/TWIP Steels[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2011,27(3):257-265.
APA Lui Fayun,Yang Ping,Meng Li,Cui Fenge,&Ding Hua.(2011).Influences of Thermal Martensites and Grain Orientations on Strain-induced Martensites in High Manganese TRIP/TWIP Steels.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,27(3),257-265.
MLA Lui Fayun,et al."Influences of Thermal Martensites and Grain Orientations on Strain-induced Martensites in High Manganese TRIP/TWIP Steels".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 27.3(2011):257-265.
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