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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 orientationrelation 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 byBaker-Nutting relation,thus it is metastable.Because the V_4C_3 precipitated along thecrystalline defects in austenite,they could be inherited to martensite.
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 reactions 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 thecrystalline defects in austenite, they could be inherited to martensite.