08/2011~07/2016: Ph.D., Tsinghua University.

08/2007~07/2011: B.A., Tsinghua University.

08/2018~Present: Assistant Research Fellow, Department of Mechanical Engineering, Tsinghua University, Beijing, China.

07/2016~07/2018: Postdoctoral Fellow, Department of Chemistry, Tsinghua University, China.

Major focus: Microstructure evolution and mechanical properties of heat-resistant alloys during non-equilibrium heat treatment.

In recent years, the personal field of interest extends to the welding of dissimilar metals (martensitic heat-resistant steel and nickel-based alloy), the transformation mechanism of heat-resistant steel under the action of non-equilibrium heat, and the integrity of welding structure.

Involvements of major research projects include:

1. Research on the mechanisms of shear austenitization in the welding of 9-12% Cr martensitic hot strength steel with B and Co, a 600, 000 Yuan project commissioned by the National Natural Science, as the second participant.

2. Development of special welding materials for FB2 steel and CrMoV steel rotor with higher thermal strength, an one million Yuan project commissioned by the Shanghai Electric Co., Ltd, as the second participant

3. Welding process research and joint performance test of 12Cr steel and NiCrMov steel rotor, as the second participant. The total amount of the project is 1 million, commissioned by Shanghai Electric Co., Ltd.

4. Research and evaluation of service safety of large welding rotor based on the change of grain boundary metallurgical behaviour toughness of retired rotor, commissioned by Shanghai Electric Co., Ltd, a 600, 000 Yuan project, as the second participant.

5. Research on rapid characterization and evaluation method of low cycle fatigue performance of rotor welding joint based on small punch test, a 600,000 Yuan project commissioned by Shanghai Electric Co., Ltd., as the second participant.

6. Impact toughness research and ageing organization analysis of new flux submerged arc welding welds for low-pressure welding rotor of nuclear power, commissioned by Shanghai Electric Gas Co., Ltd., 500, 000 Yuan project, as the second participant

7. Test and analysis of residual stress in the weld area of the first low-pressure welding rotor of Karachi K2 nuclear power plant, project commissioned by Shanghai Electric Group with 350, 000 Yuan budget, as the second participant.

11 publications including 8 SCI indexed

[1] Li X, Li K, Li S, Wu Y, Cai Z*, Pan J. Microstructure and high temperature fracture toughness of NG-TIG welded Inconel 617B superalloy[J]. Journal of Materials Science & Technology, 2020, 39: 173-182.

[2] Hou M, Li K, Li X, Zhang X, Rui S, Wu Y, Cai Z*. Effects of Pulsed Magnetic Fields of Different Intensities on Dislocation Density, Residual Stress, and Hardness of Cr4Mo4V Steel[J]. Crystals, 2020, 10(2): 115.

[3] Li S, Li K, Hu M, Wu Y, Cai Z*, Pan J. The Mechanism for HAZ Liquation of Nickel-Based Alloy 617B During Gas Tungsten Arc Welding[J]. Metals, 2020, 10(1): 94.

[4] Li X, Li K*, Cai Z*, Pan J. A Review of Austenite Memory Effect in HAZ of B Containing 9% Cr Martensitic Heat Resistant Steel[J]. Metals, 2019, 9(11): 1233.

[5] Zhang Y, Li K, Cai Z*, Pan J. Creep rupture properties of dissimilar metal weld between Inconel 617B and modified 9% Cr martensitic steel[J]. Materials Science and Engineering: A, 2019, 764: 138185.

[6] 许擎栋, 李克俭, 蔡志鹏*, 吴瑶. 脉冲磁场对 TC4 钛合金微观结构的影响及其机理探究[J]. 金属学报, 2019, 55(4): 489-495.

[7] Li Y, Li K, Cai Z*, Pan J, Liu X, Wang P. Alloy design of welding filler metal for 9Cr/2.25 Cr dissimilar welded joint and mechanical properties investigation[J]. Welding in the World, 2018, 62(6): 1137-1151.

[8] Hu M, Li K, Cai Z*, Pan J. A new weld material model used in welding analysis of narrow gap thick-walled welded rotor[J]. Journal of Manufacturing Processes, 2018, 34: 614-624.

[9] Li S, Li K, Cai Z*, Pan J. Behavior of M23C6 phase in Inconel 617B superalloy during welding[J]. Journal of Materials Processing Technology, 2018, 258: 38-46.

[10] Han C, Li K, Liu X, Cao R, Cai Z*. Effect of Ti content and martensite–austenite constituents on microstructure and mechanical property[J]. Science and Technology of Welding and Joining, 2018, 23(5): 410-419.

[11] Li K, Wu Y, Li Y, Cai Z*. Mechanism for welding liquation cracking in a boron containing 9% Cr martensitic stainless steel[J]. Journal of Manufacturing Processes, 2018, 32: 714-720.

[12] Li Y, Cai Z*, Li K, Pan J, Liu X, Sun L, Wang P. Investigation of local brittle zone in multipass welded joint of NiCrMoV steel with heavy section[J]. Journal of Materials Research, 2018, 33(8): 923-934.

[13] Li K, Cai Z*, Wu Y, Pan J. Research on austenite transformation of FB2 heat-resistant steel during welding heating process[J]. Acta Metall Sin, 2017, 53(7): 778-788.

[14] Li K, Cai Z*, Li Y F, Pan J. Constitutional liquation of the laves phase in virgin FB2 steel[J]. Weld. J, 2016, 95: 257S-263S.

[15] Li K, Cai Z*, Li Y, Pan J. Evolution behavior of Laves phase in FB2 martensitic stainless steel during welding[J]. Acta Metall Sin, 2016, 52(6): 641-648.

Patent Authorized: A Forecasting Method for the Threshold of Fatigue Crack Growth in Welded Joints