XIE Changsheng SUN Peizhen ZHAO Jiansheng SUN Desheng Huazhong University of Science and Technology
,
Wuhan
,
China
金属学报(英文版)
The inheritance phenomenon of precipitated V_4C_3 in martensitic transformation has been in- vestigated by means of electron diffraction and matrix analysis.A crystallographic orientation relation among austenite,martensite and V_4C_3 carbide was found to be. (010)_A∥( 10)_M∥(010)_(v_4c_3), [10 ]∥[11 ]_M [10 ]_(v_4c_3) The V_4C_3 first precipitated in austenite,and then was inherited to martensite.Although cer- tain orientation relation was kept between V_4C_3 and martensite,the interfacial structural ana- lysis pointed out that the biphase interfacial energy is higher than that determined by Baker-Nutting relation,thus it is metastable.Because the V_4C_3 precipitated along the crystalline defects in austenite,they could be inherited to martensite.
关键词:
V_4C_3
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XIE Changsheng Huazhong University of Science and Technology
,
Wuhan
,
China
金属学报(英文版)
By using Moire′ pattern formed by the double diffraction of precipitated V_4C_3 and matrix of γ-phase,the nature of the structure of the interface between precipitated V_4C_3 and matrix as well as the retarding effect of V4C3 particles on the development of deformation twins have been investigated.It is shown that partially coherent interfaces exist between V_4C_3 and ma- trix.Twinning dislocations may transform into interfacial dislocations under external stress, and may move continuously through bypassing or cross-sliping.
关键词:
V_4C_3
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null
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