Abstract
Deformation behavior and mechanical properties of Fe–17Cr–6Ni austenitic steel with nano/ultrafine grained microstructure and heterogeneous microstructure were studied in this investigation. With decreasing grain size, stacking fault and deformation twining gradually became the unique deformation mechanism in nano/ultrafine grained austenitic steel while in the coarse grained counterpart, deformation induced martensite transformation was always the dominant deformation mechanism. This is due to that with decreasing grain size, the critical stress for nucleating partial dislocations became smaller than that for nucleating perfect dislocations. Besides, the heterogeneous nano/ultrafine grained austenitic steel was found to possess better mechanical properties compared with homogeneous nano/ultrafine grained steel, which can be attributed to high back stress hardening and multi-stage strain hardening.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Valiev RZ, Estrin Y, Horita Z, Langdon TG, Zehetbauer MJ, Zhu Y (2016) Producing bulk ultrafine-grained materials by severe plastic deformation: ten years later. JOM 68:1216–1226
Valiev RZ, Islamgaliev RK, Alexandrov IV (2000) Bulk nanostructured materials from severe plastic deformation. Prog Mater Sci 45:103–189
Zhu YT, Lowe TC, Langdon TG (2004) Performance and applications of nanostructured materials produced by severe plastic deformation. Scripta Mater 51:825–830
Wang Y, Chen M, Zhou F, Ma E (2002) High tensile ductility in a nanostructured metal. Nature 419:912–915
Xu DM, Li GQ, Wan XL, Xiong RL, Xu G, Wu KM, Somani MC, Misra RDK (2017) Deformation behavior of high yield strength-high ductility ultrafine-grained 316LN austenitic stainless steel. Mater Sci Eng A 688:407–415
Yang X, Sun S, Wu X, Ma E, Zhang T (2014) Dissecting the mechanism of martensitic transformation via atomic-scale observations. Sci Rep 4:6141
Kisko A, Misra RDK, Talonen J, Karjalainen LP (2013) The influence of grain size on the strain-induced martensite formation in tensile straining of an austenitic 15Cr–9Mn–Ni–Cu stainless steel. Mater Sci Eng A 578:408–416
Lei C, Deng X, Li X, Wang Z, Wang G, Misra RDK (2016) Mechanical properties and strain hardening behavior of phase reversion-induced nano/ultrafine Fe-17Cr-6Ni austenitic structure steel. J Alloy Compd 689:718–725
Misra RDK, Challa VSA, Venkatsurya PKC, Shen YF, Somani MC, Karjalainen LP (2013) Interplay between grain structure, deformation mechanisms and austenite stability in phase-reversion-induced nanograined/ultrafine-grained austenitic ferrous alloy. Acta Mater 84:339–348
Huang CX, Yang G, Wang C, Zhang ZF, Wu SD (2011) Mechanical behaviors of ultrafine-grained 301 austenitic stainless steel produced by equal-channel angular pressing. Metall Mater Trans A 42:2061–2071
Xiong L, You ZS, Qu SD, Lu L (2018) Fracture behavior of heterogeneous nanostructured 316L austenitic stainless steel with nanotwin bundles. Acta Mater 150:130–138
Cheng Z, Zhou H, Lu Q, Gao H, Lu L (2018) Extra strengthening and work hardening in gradient nanotwinned metals. Science 362:u1925
Lei C, Deng X, Li X, Wang Z (2019) Simultaneous enhancement of strength and ductility through coordination deformation and multi-stage transformation induced plasticity (TRIP) effect in heterogeneous metastable austenitic steel. Scripta Mater 162:421–425
Yuan F, Yan D, Sun J, Zhou L, Zhu Y, Wu X (2019) Ductility by shear band delocalization in the nano-layer of gradient structure. Mater Res Lett 7:12–17
Park HK, Ameyama K, Yoo J, Hwang H, Kim HS (2018) Additional hardening in harmonic structured materials by strain partitioning and back stress. Mater Res Lett 6:261–267
Wu X, Zhu Y (2017) Heterogeneous materials: a new class of materials with unprecedented mechanical properties. Mater Res Lett 5:527–532
Yang M, Pan Y, Yuan F, Zhu Y, Wu X (2016) Back stress strengthening and strain hardening in gradient structure. Mater Res Lett 4:145–151
Ma E, Zhu T (2017) Towards strength-ductility synergy through the design of heterogeneous nanostructures in metals. Mater Today 20:323–331
Acknowledgements
The authors gratefully acknowledge support from the National Key Research and Development Program 2016 YFB 0300600, 2017YFB0305100 and National Science Foundation of China (Grant nos. 51474064, 51504064).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2020 The Minerals, Metals & Materials Society
About this paper
Cite this paper
Deng, X., Lei, C., Wang, Z. (2020). Deformation Mechanism and Mechanical Properties of Nano/Ultrafine Grained and Heterogeneous Fe–17Cr–6Ni Austenitic 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_193
Download citation
DOI: https://doi.org/10.1007/978-3-030-36296-6_193
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)