Abstract
The effect of the cooling time between the welding pulses and post-heating pulses on the cross tensile strength (CTS) of the resistance spot welded medium manganese steel (RSW-MMS) was studied in this paper. Optical microscope (OM) and scanning electron microscope (SEM ) were employed to analyze the microstructure evolution. The results showed that the microstructure in nugget with cooling time of 100 ms was martensite and the microhardness could reach ~530 HV. On the contrary, the microstructure of the sample cooled for 2000 ms was tempered martensite with the microhardness of ~ 370 HV. Accordingly, the strength increased from 1.8 to 3.4 kN accompanied with the failure mode transformed from interfacial fracture (IF) to partial interfacial fracture (PIF). The improvement of the CTS for the resistance spot welded 7 Mn MMS was mainly attributed to the higher ability of the tempered martensite to prevent the crack propagation .
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Lee YK, Han J (2015) Current opinion in medium manganese steel. Mater Sci Technol 31(7):843–856
Hu J, Du LX, Xu W, Zhai JH, Dong Y, Liu YJ, Misra RDK (2018) Ensuring combination of strength, ductility and toughness in medium-manganese steel through optimization of nano-scale metastable austenite. Mater Charact 136:20–28
Li ZC, Ding H, Misra RDK, Cai ZH (2017) Microstructure-mechanical property relationship and austenite stability in medium-Mn TRIP steels: The effect of austenite-reverted transformation and quenching-tempering treatments. Mater Sci Eng A 682:211–219
Lee SJ, Lee S, De Cooman BC (2013) Martensite transformation of sub-micron retained austenite in ultra-fine grained manganese transformation-induced plasticity steel. Int J Mater Res 104(5):423–429
Park G, Kim K, Uhm S, Lee C (2019) A comparison of cross-tension properties and fracture behavior between similar and dissimilar resistance spot-weldments in medium-Mn TRIP steel. Mater Sci Eng A 752:206–216
Baltazar Hernandez VH, Panda SK, Kuntz ML, Zhou Y (2010) Nanoindentation and microstructure analysis of resistance spot welded dual phase steel. Mater Lett 64(2):207–210
Wakabayashi C, Furusako S, Miyazaki Y (2015) Strengthening spot weld joint by autotempering acceleration at heat affected zone. Sci Technol Weld Joining 20(6):468–472
Pouranvari M, Marashi SPH (2012) Failure mode transition in AISI 304 resistance spot welds. Weld. J. 91(11):303s–309s
Ramazani A, Mukherjee K, Abdurakhmanov A, Abbasi M, Prahl U (2015) Characterization of microstructure and mechanical properties of resistance spot welded DP600 steel. Metals 5(3):1704–1716
Zhong N, Liao XS, Wang M, Wu YX, Rong YH (2011) Improvement of microstructures and mechanical properties of resistance spot welded DP600 steel by double pulse technology. Mater Trans 52(12):2143–2150
Dancette S, Fabrègue D, Massardier V, Merlin J, Dupuy T, Bouzekri M (2011) Experimental and modeling investigation of the failure resistance of advanced high strength steels spot welds. Eng Fract Mech 78(10):2259–2272
Pouranvari M, Marashi SPH, Mousavizadeh SM (2010) Failure mode transition and mechanical properties of similar and dissimilar resistance spot welds of DP600 and low carbon steels. Sci Technol Weld Joining 15(7):625–631
Pouranvari M, Asgari HR, Mosavizadch SM, Marashi PH, Goodarzi M (2007) Effect of weld nugget size on overload failure mode of resistance spot welds. Sci Technol Weld Joining 12(3):217–225
Ashiri R, Marashi SPH, Park YD (2018) Weld processing and mechanical responses of 1-GPa TRIP steel resistance spot welds. Weld J 97(5):157s–169s
Pouranvari M, Marashi SPH, Safanama DS (2011) Failure mode transition in AHSS resistance spot welds. Part II: experimental investigation and model validation. Mater Sci Eng A 528(29–30):8344–8352
Amirthalingam M, Van Der Aa EM, Kwakernaak C, Hermans MJM, Richardson IM (2015) Elemental segregation during resistance spot welding of boron containing advanced high strength steels. Weld World 59(5):743–755
Kuzmina M, Ponge D, Raabe D (2015) Grain boundary segregation engineering and austenite reversion turn embrittlement into toughness: example of a 9 wt.% medium Mn steel. Acta Mater 86:182–192
Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant no. U1760102), the State Key Laboratory of Development and Application Technology of Automotive Steels (Baosteel Group), and the financial support by the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning.
Author information
Authors and Affiliations
Corresponding authors
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Wang, Y. et al. (2020). Effect of the Cooling Time on the Cross Tensile Strength of the Resistance Spot Welded Medium Manganese Steel. In: TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-36296-6_48
Download citation
DOI: https://doi.org/10.1007/978-3-030-36296-6_48
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-36295-9
Online ISBN: 978-3-030-36296-6
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)