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材料导报  2020, Vol. 34 Issue (22): 22111-22117    https://doi.org/10.11896/cldb.19070161
  金属与金属基复合材料 |
钛元素对9Cr氧化物弥散强化钢微观组织和拉伸性能的影响
谢锐1, 吕铮2, 徐长伟1, 刘春明2
1 沈阳建筑大学材料科学与工程学院,沈阳 110168
2 东北大学材料科学与工程学院,材料各向异性与织构教育部重点实验室,沈阳 110819
Effect of Ti Element on the Microstructures and Tensile Properties of 9Cr Oxides Dispersion Strengthened Steels
XIE Rui1, LYU Zheng2, XU Changwei1, LIU Chunming2
1 School of Material Science and Engineering,Shenyang Jianzhu University,Shenyang 110168, China
2 Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China
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摘要 本工作以9Cr氧化物弥散强化钢为研究对象,通过热等静压的方式分别制备含金属钛与不含金属钛的两个9Cr氧化物弥散强化钢样品。对成型后的9Cr氧化物弥散强化钢的微观组织及拉伸性能进行观察和测量。利用透射电镜、基于同步辐射装置作为光源的X射线吸收精细结构谱技术及小角度X射线散射技术研究金属钛对氧化物弥散强化钢中氧化物相的影响,表征金属钛元素对氧化物弥散强化钢样品拉伸性能的影响。实验结果表明,向9Cr氧化物弥散强化钢样品中添加金属钛后,样品的晶粒得到细化,添加金属钛后样品的晶粒尺寸仅为1.2 μm,同时,样品中氧化物相的种类发生改变,倾向于形成Y2Ti2O7相及Y-Ti-O团簇,氧化物相的粒径在下降,分布密度却在升高。9Cr氧化物弥散强化钢样品的拉伸强度在金属钛元素添加后得到提高,室温时添加金属钛元素的9Cr氧化物弥散强化钢样品的拉伸强度达到1 324 MPa,在氧化物弥散强化钢中弥散强化是最主要的强化机制。随着测试温度的不断升高,样品的拉伸强度逐渐下降。
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谢锐
吕铮
徐长伟
刘春明
关键词:  氧化物弥散强化钢  钛元素  X射线吸收精细结构谱  小角度X射线散射  微观组织  拉伸性能    
Abstract: In this paper 9Cr oxide dispersion strengthened (ODS) steels were studied. 9Cr-ODS steels with Ti element and Ti-free were manufactured by hot isostatic pressing (HIP) method. After HIP the microstructures and tensile properties of 9Cr-ODS steels were observed and mea-sured. The effects of Ti element on the oxides in ODS steels were studied by transmission electron microscope (TEM), X-ray absorption fine structure (XAFS) and small-angle X-ray scattering (SAXS) technologies. The effect of Ti element on tensile properties of 9Cr-ODS steels was also measured. The experimental results show that the grain size of 9Cr-ODS steel sample is refined after Ti element added. The mean grain size of 9Cr-ODS steel with Ti element is 1.2 μm. After adding Ti element, the types of oxide are changed, Y2Ti2O7 phase and Y-Ti-O cluster are tend to form in the ODS steels. The particle size of oxides phase decreases, but the distribution density increases, after Ti element added. The tensile strength of 9Cr-ODS steel sample is increased after adding Ti element. The tensile strength at room temperature reaches to 1 324 MPa. The main strengthening mechanism is dispersion strengthening in ODS steel. The tensile strengths of the samples decrease as the test temperature increased.
Key words:  oxide dispersion strengthened steels    Ti element    X-ray absorption fine structure    small-angle X-ray scattering    microstructure    tensile properties
               出版日期:  2020-11-25      发布日期:  2020-12-02
ZTFLH:  TB31  
基金资助: 国家自然科学基金青年基金项目(51601031)
通讯作者:  xierui198479@126.com   
作者简介:  谢锐,沈阳建筑大学讲师。2007年于沈阳建筑大学获得无机非金属材料工程学士学位,2010年9月至2015年7月于东北大学获得材料学博士学位。博士毕业后继续在东北大学冶金工程博士后流动站工作。工作时间为2015年10月至2018年3月。2018年3月博士后出站到沈阳建筑大学任教。至今已公开发表学术论文超过15篇,获得国家专利授权两项。谢锐的研究领域主要围绕国家重点发展的先进金属材料、核反应堆用金属结构材料。同时,他的研究方向还获得了国家自然科学基金青年科学家基金项目、国家重大研发专项子课题、辽宁省自然科学基金等项目的支持。
引用本文:    
谢锐, 吕铮, 徐长伟, 刘春明. 钛元素对9Cr氧化物弥散强化钢微观组织和拉伸性能的影响[J]. 材料导报, 2020, 34(22): 22111-22117.
XIE Rui, LYU Zheng, XU Changwei, LIU Chunming. Effect of Ti Element on the Microstructures and Tensile Properties of 9Cr Oxides Dispersion Strengthened Steels. Materials Reports, 2020, 34(22): 22111-22117.
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http://www.mater-rep.com/CN/10.11896/cldb.19070161  或          http://www.mater-rep.com/CN/Y2020/V34/I22/22111
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