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首页> 外文期刊>ISIJ international >Multiphase Crystallography in the Nucleation of Intragranular Ferrite on MnS + V(C, N) Complex Precipitate in Austenite
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Multiphase Crystallography in the Nucleation of Intragranular Ferrite on MnS + V(C, N) Complex Precipitate in Austenite

机译：奥氏体中MnS + V（C，N）络合物沉淀物上晶内铁素体成核的多相晶体学

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摘要

Crystallographic orientation relationships between intragranular ferrites, the MnS + V(C, N) complex precipitates acting as ferrite nucleation sites, and austenite matrix were studied in Fe-Mn-C alloys by scanning electron and transmission electron microscopy. VC holds a cube-cube orientation relationship (<001>_(gamma)//<001>_(VC)) when it is formed directly within austenite grains in an Fe-12Mn-0.8C-0.3V alloy. When VC precipitates nucleate on incoherent MnS particles dispersed in austenite, there is no specific orientation relationship between the three phases. Intragranular ferrite idiomorphs nucleating on the MnS + V(C, N) complex precipitate in austenite in Fe-1.5Mn-0.2C and Fe-2Mn-0.2C alloys often hold the Baker-Nutting orientation relationship ((001)_(alpha)//(001)_(V(C, N)), [110]_(alpha)//[100]_V(C, N)) Although several irrational ferrite/V(C, N) orientation relationships were observed, misorientation for either low-index planes or directions are relatively small between ferrite and V(C, N) for those relationships. The orientation relationships between intragranular ferrite and austenite were estimated by examining the misorientations between the ferrite and the neighboring martensite lathes from the Kurdjumov-Sachs inter-variant relationships. There is no specific orientation relationship between the intragranular ferrite idiomorph and the austenite matrix because of the low-energy orientation relationships between ferrite and V(C, N).
机译：通过扫描电子和透射电子显微镜研究了Fe-Mn-C合金中的晶粒内铁素体，MnS + V（C，N）络合物沉淀物（作为铁素体成核位点）和奥氏体之间的晶体取向关系。当VC直接形成在Fe-12Mn-0.8C-0.3V合金的奥氏体晶粒内时，VC保持立方-立方取向关系（<001>_γ// <001> _（VC））。当VC沉淀成核在分散在奥氏体中的不相干MnS颗粒上时，这三个相之间没有特定的取向关系。 Fe-1.5Mn-0.2C和Fe-2Mn-0.2C合金中奥氏体中MnS + V（C，N）络合物析出物上成核的晶内铁素体晶型通常保持Baker-Nutting取向关系（（001）_α //（001）_（V（C，N）），[110]_α// [100] _V（C，N））尽管观察到几种不合理的铁素体/ V（C，N）取向关系，对于这些关系，低折射率平面或方向的错误取向在铁素体和V（C，N）之间相对较小。通过从Kurdjumov-Sachs互变关系中检查铁素体与相邻马氏体车床之间的取向差，可以估算出晶粒内铁素体与奥氏体之间的取向关系。由于铁素体与V（C，N）之间的能量低取向关系，因此晶粒内铁素体独特晶型与奥氏体之间没有特定的取向关系。

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