离子研磨对TRIP780钢中残留奥氏体含量和稳定性的影响

doi:10.13251/j.issn.0254-6051.2020.07.040

摘要/Abstract

摘要： 研究了经离子研磨对TRIP780钢中残留奥氏体含量与稳定性的影响。首先利用电解抛光技术对TRIP780钢进行样品制备以去除样品表面的应力层,然后利用离子研磨仪对所得样品进行离子研磨,再借助场发射扫描电镜对TRIP780钢中的残留奥氏体进行形貌观察与分析,利用电子背散射衍射技术(EBSD)对离子研磨前后的TRIP钢中残留奥氏体含量进行定性和定量分析。结果表明,与电解抛光相比,离子研磨技术同样可以很好的去除样品表面应力层,但是对于TRIP780钢,经过离子研磨后样品中残留奥氏体的含量大幅度减少,从原来的10.1%骤降至0.02%。从残留奥氏体的菊池花样可以看出,经离子研磨后的残留奥氏体菊池花样明显变差,甚至模糊不清。经离子研磨后的TRIP780钢中残留奥氏体含量明显下降,同时其相结构确实发生了转变,由原来的面心立方结构转变为体心立方结构(即fcc→bcc),由此表明残留奥氏体在受到离子轰击后极其不稳定,易发生相变,这一点在残留奥氏体的准原位试验中得到了进一步的验证。同时离子研磨诱发了晶格的畸变,导致菊池花样清晰度明显下降,花样分辨率降低。

关键词: 离子研磨, TRIP780钢, 残留奥氏体, EBSD, 菊池花样

Abstract: Effect of ion milling on the content and stability of retained austenite in TRIP780 steel was investigated. Firstly, TRIP780 steel specimens were prepared by electropolishing to remove the stress layer on their surface, then ion milled and the retained austenite in the specimens was examined by field emission scanning electron microscope. The retained austenite content in the TRIP780 steel before and after ion milling was further analyzed qualitatively and quantitatively by electron backscatter diffraction (EBSD).The results show that, compared with electropolishing, the ion milling can also remove the stress layer on the specimen surface, however, the retained austenite content in the TRIP780 steel specimen after ion milling is greatly reduced from the original 10.1% to 0.02%, and the Kikuchi pattern of the retained austenite after ion milling is obviously worse or even blurred. The retained austenite content in the ion-milled TRIP780 steel decreases significantly, and the phase structure changes from the original face-centered cubic to the body-centered cubic (fcc→bcc), thus indicating the retained austenite is extremely unstable after ion bombardment and is prone to phase transformation, which is also verified in the quasi-in-situ experiment of retained austenite. The ion milling induces lattice distortion, resulting in a significant decrease in the clarity and resolution of the Kikuchi pattern.

Key words: ion milling, TRIP780 steel, retained austenite, EBSD, Kikuchi pattern

中图分类号:

TG147

崔桂彬, 鞠新华, 孟杨, 杨瑞. 离子研磨对TRIP780钢中残留奥氏体含量和稳定性的影响[J]. 金属热处理, 2020, 45(7): 198-201.

Cui Guibin, Ju Xinhua, Meng Yang, Yang Rui. Effect of ion milling on retained austenite content and stability in TRIP780 steel[J]. Heat Treatment of Metals, 2020, 45(7): 198-201.

参考文献

[1]汪淼, 张聪, 胡锋, 等. 相变诱导塑性汽车用钢的发展现状与趋势[J]. 钢铁研究学报, 2016, 28(8): 1-7.
Wang Miao, Zhang Cong, Hu Feng, et al. Current status and trend of TRIP automotive steels[J]. Journal of Iron and Steel Research[J], 2016, 28(8): 1-7.
[2]王四根, 花礼先, 王绪, 等. 低碳硅锰系冷轧相变诱发塑性钢研究[J]. 钢铁, 1995, 30(6): 48-51.
Wang Sigen, Hua Lixian, Wang Xu, et al. Low carbon silicon manganese cold-rolled TRIP steel[J]. Iron and Steel, 1995, 30(6): 48-51.
[3]吴化, 姜颖, 尤申申, 等. 超级贝氏体组织中残余奥氏体的TRIP效应研究[J]. 机械工程学报, 2014, 50(22): 69-75.
Wu Hua, Jiang Ying, You Shenshen, et al. Study on TRIP effect of retained austenite in super-bainite microstructure[J]. Journal of Mechanical Engineering, 2014, 50(22): 69-75.
[4]景财年, 王作成, 韩福涛. 相变诱发塑性的影响因素研究进展[J]. 金属热处理, 2005, 30(2): 26-30.
Jing Cainian, Wang Zuocheng, Han Fushou. Research progress of the influencing factors on transformation induced plasticity[J]. Heat Treatment of Metals, 2005, 30(2): 26-30.
[5]冯树明, 万德成, 王亚婷, 等. Q&P处理低碳中锰钢的显微组织与力学性能[J]. 金属热处理, 2020, 45(4): 69-74.
Feng Shuming, Wan Decheng, Wang Yating. Microstructure and mechanical properties of low carbon medium manganese steel treated by Q&P process[J]. Heat Treatment of Metals, 2020, 45(4): 69-74.
[6]高绪涛, 赵爱民, 赵征志, 等. 热轧TRIP钢残余奥氏体及其稳定性研究[J]. 材料工程, 2011(11): 39-43.
Gao Xutao, Zhao Aimin. Investigation of retained austenite and its stability in hot rolled TRIP steel[J]. Journal of Materials Engineering, 2011(11): 39-43.
[7]赵北龙, 王勇围. 残余奥氏体形态对TRIP690钢组织转变的影响[J]. 塑性工程学报, 2012, 19(2): 75-78.
Zhao Beilong, Wang Yongwei. Effect of residual austenite morphology on microstructure transformation of TRIP690 steel[J]. Journal of Plasticity Engineering, 2012, 19(2): 75-78.
[8]郝京丽, 鞠新华, 崔桂彬, 等. DP590双相钢电解抛光技术的精细研究[J]. 物理测试, 2013, 31(2): 39-42.
Hao Jingli, Ju Xinhua, Cui Guibin, et al. Deep investigation on electrolytic polishing of duplex steel[J]. Physics Examination and Testing, 2013, 31(2): 39-42.
[9]Knipling K E, Rowenhorst D J, Fonda R W, et al. Effects of focused ion beam milling on austenite stability in ferrous alloys[J]. Materials Characterazation, 2010, 61: 1-6.
[10]Konrad J, Zaefferer S, Raabe D. Investigation of orientation gradients around a hard Laves particle in a warm-rolled Fe3Al-based alloy using a 3D EBSD-FIB technique[J]. Acta Material, 2006, 54: 1369-1380.
[11]Groeber M A, Haley B K, Uchic M D, et al. 3D Reconstruction and characterization of polycrystalline microstructures using a FIB-SEM system[J]. Materials Characterization, 2006, 57(4/5): 259-273.
[12]Wright D M, Rickard J J, Kyle N H, et al. The use of dual beam ESEM FIB to reveal the internal ultrastructure of hydroxyapatite nanoparticle-sugar-glass composites[J]. Journal of Materials Science: Materials in Medicine, 2009, 20(1): 203-217.
[13]朱泳名, 葛鹰. 基于离子研磨技术的覆铜板结构观察研究[J]. 印制电路信息, 2014(12): 32-34.
Zhu Yongming, Ge Ying. Observation of copper clad laminate structure based on the technology of ion milling[J]. Printed Circuit Information, 2014(12): 32-34.
[14]谭勇文, 徐天伟, 谢雪冰, 等. 聚焦离子束研磨Au-Ti-GaAs薄膜引起损伤的研究[J]. 材料导报, 2008, 22(S1): 75-77.
Tan Yongwen, Xu Tianwei, Xie Xuebing, et al. Investigation of damage induced in focused ion beam milling of Au-Ti-GaAs thin films[J]. Materials Reports, 2008, 22(S1): 75-77.
[15]王付胜, 何鹏, 郁佳琪, 等. 氩离子轰击对中频-直流磁控溅射铝薄膜耐蚀性能的影响[J]. 表面技术, 2019, 48(3): 185-194.
Wang Fusheng, He Peng, Yu Jiaqi, et al. Effects of argon ion bombardment on corrosion resistance of Al film deposited by medium frequency direct current magnetron sputtering[J]. Surface Technology, 2019, 48(3): 185-194.