研究领域或方向：

研究方向一：层状超细晶双相钢的设计及其强韧化

研究方向二：高碳马氏体钢相变机理及其性能研究

研究方向三：高性能轨道交通用辙叉钢

工作经历：

2020.08-至今     西安交通大学   bwin必赢  副教授

2017.07-2020.07  西安交通大学   bwin必赢  助理研究员

科研项目：

科研项目一：基于组织遗传的层状超细晶双相钢制备及强韧化机理研究, 国家自然科学基金（青年基金），51801144，2019.1-2021.12， 29.84万元， 主持

科研项目二：高强韧层状超细晶双相钢的强韧化机理研究，中国博士后基金，2018M643629，2018.11-2020.11，5万元，主持

科研项目三：高强韧层状超细晶双相钢的强韧化机理研究，陕西省自然科学基金（青年基金），2020JQ-049，2020.01-2021.12，3万元，主持

科研项目四：贝钢材料合金成分及热处理工艺开发，中铁宝桥集团有限公司（横向），2019.4-2022.12，80万元，主持

科研项目五：EN15689标准高锰钢辙叉机械性能试验研究，中铁宝桥集团有限公司（横向），2019.4-2019.6，20万元，主持

科研项目六：合金钢油淬火回火工艺组织与性能分析，江苏法尔胜研发中心有限公司（横向），2018.10-2019.6，2万元，主持

科研项目七：提高高锰钢辙叉服役寿命的关键技术研究，中铁宝桥集团有限公司（横向），2018.8-2021.8，133万元，参与（排名2）

近期学术成果：

1. Junjie Sun, Shengwu Guo, Shengdun Zhao, Mingyue Ma, Yongning Liu; Improving strength of cold-drawn wire by martensitic transformation in a 0.65 wt% C low-alloy steel, Materials Science and Engineering A, (2020) 790, 139719.

2. Junjie Sun, Chen Yang, Shengwu Guo, Xuejiao Sun, Mingyue Ma, Shengdun Zhao, Yongning Liu; A novel process to obtain lamella structured low-carbon steel with bimodal grain size distribution for potentially improving mechanical property, Materials Science and Engineering: A, (2020) 785, 139339.

3. Junjie Sun, Yingjun Wang, Shengwu Guo, Yongning Liu*; Effect of prior austenite grain size on isothermal bainite transformation in 65Cr steel, Materials Letter, 2020, 266, 127495.

4. Junjie Sun, Tao Jiang, Yingjun Wang, et al., Utrafine grained dual-phase martensite/ferrite steel strengthened and toughened by lamella structure, Materials Science and Engineering: A, (2018) 734, 311-317.

5. Junjie Sun, Tao Jiang, Yingjun Wang, et al., Effect of grain refinement on high-carbon martensite transformation and its mechanical properties, Materials Science and Engineering: A, (2018) 726, 342-349.

6. Junjie Sun, Yongning Liu, Yuntian Zhu, et al., Super-strong dislocation-structured high-carbon martensite steel. Scientific Reports, (2017) 7.

7. Junjie Sun, Tao Jiang, Yu Sun, et al., A lamellar structured ultrafine grain ferrite-martensite dual-phase steel and its resistance to hydrogen embrittlement, Journal of Alloys & Compounds, (2017) 698, 390-399.

8. Junjie Sun, Tao Jiang, Hongji Liu, et al., Enhancement of impact toughness by delamination fracture in a low-alloy high-strength steel with Al alloying, Metallurgical & Materials Transactions A, (2016), 1-9.

9. Junjie Sun, Fuliang Lian, Hongji Liu, et al., Microstructure of warm rolling and pearlitic transformation of ultrafine-grained GCr15 steel, Materials Characterization, (2014) 95, 291-298.

10. Tao Jiang, Junjie Sun, Hongji Liu, et al., A high performance martensitic stainless steel containing 1.5wt% Si, Materials & Design, (2017) 125, 35-45.

11. Yingjun Wang, Junjie Sun, Tao Jiang, et al., A low-alloy high-carbon martensite steel with 2.6 GPa tensile strength and good ductility, Acta Materialia, (2018) 158, 247-256.

12. Hongji Liu, Junjie Sun, Tao Jiang, et al., Improved rolling contact fatigue life for an ultrahigh-carbon steel with nanobainitic microstructure, Scripta Materialia, (2014) 90-91, 17-20.

13. 孙俊杰，柳永宁，江涛，郭生武；一种层状超细晶双相铁素体/马氏体钢及其制备方法，2020-03-31，中国，ZL201711217801.3

14. 孙俊杰，柳永宁，江涛; 一种汽车零件用低碳马氏体非调质钢的制备方法, 2017-10-20, 中国, ZL201510707844.4

15. 孙俊杰，柳永宁，江涛; 一种高强度高韧性层状组织低碳马氏体钢的制备方法, 2018-04-17, 中国, ZL201511028697.4