周明星,余可多,周书翊,李瑞智,王佳豪,汪子健

• 1:武汉科技大学耐火材料与冶金国家重点实验室

摘要(Abstract)：

贝氏体相变过程中经常会受到应力/应变的影响，其相变动力学和显微组织将发生显著改变。采用热模拟试验机、扫描电镜、透射电镜、电子背散射衍射技术等研究了应力对一种中碳超细晶贝氏体钢显微组织的影响。结果表明：随着应力的增大，贝氏体板条厚度先增加后减小。应力提供的额外机械驱动力导致贝氏体板条粗化，而奥氏体变形则有利于细化板条，两者相互竞争造成了上述现象。此外，通过对比实验极图和理论计算极图发现，在本实验条件下，奥氏体与贝氏体之间更符合Nishiyama-Wassermann(N-W)取向关系。施加应力后，贝氏体变体种类显著减少，产生明显变体选择。

关键词(KeyWords)： 贝氏体;显微组织;晶体学;应力

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52004192);; 中国博士后科学基金(2021M692488);; 河北省自然科学基金(E2022318018);; 武汉科技大学大学生创新创业训练计划项目(D202305082148204930)

作者(Author): 周明星,余可多,周书翊,李瑞智,王佳豪,汪子健

DOI: 10.13289/j.issn.1009-6264.2023-0433

参考文献(References)：

• [1] Garcia-Mateo C,Caballero F G,Bhadeshia H K D H.Development of hard bainite[J].ISIJ International,2003,43(8):1238-1243.
• [2] Caballero F G,Bhadeshia H K D H.Very strong bainite[J].Current Opinion in Solid State and Materials Science,2004,8(3/4):251-257.
• [3] Caballero F G,Santofimia M J,García-Mateo C,et al.Theoretical design and advanced microstructure in super high strength steels[J].Materials & Design,2009,30(6):2077-2083.
• [4] Hase K,Garcia-Mateo C,Bhadeshia H K D H.Bainite formation influenced by large stress[J].Materials Science and Technology,2004,20(12):1499-1505.
• [5] Uslu M C,Canadinc D,Lambers H,et al.Modeling the role of external stresses on the austenite-to-bainite phase transformation in 51CrV4 steel[J].Modelling and Simulation in Materials Science and Engineering,2011,19(4):45007.
• [6] Holzweissig M J,Canadinc D,Maier H J.In-situ characterization of transformation plasticity during an isothermal austenite-to-bainite phase transformation[J].Materials Characterization,2012,65:100-108.
• [7] Zhou M,Xu G,Hu H,et al.Comprehensive analysis on the effects of different stress states on the bainitic transformation[J].Materials Science and Engineering A,2017,704:427-433.
• [8] Zhou M,Xu G,Hu H,et al.Kinetics model of bainitic transformation with stress[J].Metals and Materials International,2018,24(1):28-34.
• [9] 苏铁健，李树奎，张朝晖，等.外加应力对贝氏体相变组织形貌的影响[J].材料科学与工艺，2005(3):251-253.SU Tie-jian,LI Shu-kui,ZHANG Zhao-hui,et al.Effects of external stress on bainitic morphologies[J].Materials Science & Technology,2005(3):251-253.
• [10] Su T J,Aeby-Gautier E,Denis S.Morphology changes in bainite formed under stress[J].Scripta Materialia,2006,54(12):2185-2189.
• [11] Zhang S B,Li W J.Effects of applied compressive stress on microstructure and mechanical properties of Cr-Mo steel during continuous cooling bainitic transformation[J].Advanced Materials Research,2011,194-196:341-346.
• [12] Zhou M,Liu G,Tian J,et al.Microstructure and crystallography of a carbide-free bainite steel under the effect of stress[J].Metallurgical and Materials Transactions A,2022,53(6):2226-2238.
• [13] Gong W,Tomota Y,Adachi Y,et al.Effects of ausforming temperature on bainite transformation,microstructure and variant selection in nanobainite steel[J].Acta Materialia,2013,61(11):4142-4154.
• [14] Kabirmohammadi M,Avishan B,Yazdani S.Transformation kinetics and microstructural features in low-temperature bainite after ausforming process[J].Materials Chemistry and Physics,2016,184:306-317.
• [15] Garcia-Mateo C,Jimenez J A,Lopez-Ezquerra B,et al.Analyzing the scale of the bainitic ferrite plates by XRD,SEM and TEM[J].Materials Characterization,2016,122:83-89.
• [16] Eres-Castellanos A,Hidalgo J,Zorgani M,et al.Assessing the scale contributing factors of three carbide-free bainitic steels:A complementary theoretical and experimental approach[J].Materials & Design,2021,197:109217.
• [17] Bhadeshia H K D H.Bainite in Steels[M].London:Institute of Materials,Minerals & Mining,2015.
• [18] Bhadeshia H K D H.Developments in martensitic and bainitic steels:role of the shape deformation[J].Materials Science and Engineering A,2004,378:34-39.
• [19] Bhadeshia H K D H.Thermodynamic analysis of isothermal transformation diagrams[J].Metal Science,1982,16:159-165.
• [20] Hu F,Wu K M.Nanostructured high-carbon dual-phase steels[J].Scripta Materialia,2011,65:351-354.
• [21] Wu Y S,Liu Z,Qin X,et al.Effect of initial state on hot deformation and dynamic recrystallization of Ni-Fe based alloy GH984G for steam boiler applications[J].Journal of Alloys and Compounds,2019,795:370-384.
• [22] Wu Y S,Qin X Z,Wang C S,et al.Influence of phosphorus on hot deformation microstructure of a Ni-Fe-Cr based alloy[J].Materials Science and Engineering A,2019,768:138454.
• [23] Suikkanen P P,Cayron C,DeArdo A J,et al.Crystallographic analysis of isothermally transformed bainite in 0.2C-2.0Mn-1.5Si-0.6Cr steel using EBSD[J].Journal of Materials Science & Technology,2013,29(4):359-366.
• [24] Furuhara T,Kawata H,Morito S,et al.Variant selection in grain boundary nucleation of upper bainite[J].Metallurgical and Materials Transactions A,2008,39(5):1003-1013.
• [25] Kaneshita T,Miyamoto G,Furuhara T.Variant selection in grain boundary nucleation of bainite in Fe-2Mn-C alloys[J].Acta Materialia,2017,127:368-378.

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