Metallurgical and Materials Transactions A

, Volume 47, Issue 10, pp 4862–4868 | Cite as

Characterization of M23C6 Carbides Precipitating at Grain Boundaries in 100Mn13 Steel

Article
First Online:

Abstract

Characteristics of the formation, the interfacial structure, and the defects of M23C6 carbides in 100Mn13 steel after 1323 K (1050 °C) solution treatment and subsequent aging treatment were investigated by transmission electron microscope (TEM). The results show that M23C6 carbides precipitated on both sides of the grain boundaries. Each M23C6 carbide particle possesses a coherent interface and the cube–cube orientation relationship with the one austenite grain which M23C6 precipitated from. The orientation relationships between the M23C6 carbides and the austenite matrix were determined as follows: (1) [211]γ \( \parallel \)[211]M23C6, (\( 1\bar{1}\bar{1} \))γ \( \parallel \)(\( 1\bar{1}\bar{1} \))M23C6, (02\( \bar{2} \))γ \( \parallel \)(02\( \bar{2} \))M23C6, (2) [110]γ \( \parallel \)[110]M23C6, (\( \bar{1}1\bar{1} \))γ \( \parallel \)(\( \bar{1}1\bar{1} \))M23C6, (\( \bar{1} \)11)γ \( \parallel \)(\( \bar{1} \)11)M23C6. The M23C6 carbide also possesses an incoherent interface with the other austenite grain which the M23C6 carbide grew into by ledge mechanism. The precipitation of the M23C6 carbides along the boundaries can improve the hardness of the high-manganese steel to some extent. Besides, twinning and stacking faults were observed in M23C6 carbides. The reports about twinning and stacking faults in the M23C6 carbides have not been found.

Keywords

Carbide Austenite Orientation Relationship Duplex Stainless Steel M23C6 Carbide 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgments

The authors are grateful to Professor Zhiquan LIU and Dr. Shuang GAO of Institute of Metal Research, Chinese Academy of Sciences, for valuable guidance and assistance in this work. This work was supported by the Program for Liaoning Excellent Talents in University within the Project No. LR2012014, the Technology Promotion Program from the Ministry of Railway of China within the Project No. 2012G011-D, and Science and Technology Project of Dalian within the Project No. 2013A16GX119.

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Copyright information

© The Minerals, Metals & Materials Society and ASM International 2016

Authors and Affiliations

  • Zhenfeng Xu
    • 1
  • Zhimin Ding
    • 1
  • Linnan Dong
    • 2
  • Bo Liang
    • 3
  1. 1.College of Materials Science and EngineeringDalian Jiaotong UniversityDalianChina
  2. 2.Hunan Aerospace Precision Machinery Co. LTDChangshaChina
  3. 3.Dalian Locomotive and Rolling Stock Co., Ltd. Cnr GroupDalianChina

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