A comparative study on mechanical properties and microstructure of 316L austenitic stainless steel between solution treated specimen and hot rolled specimen was conducted. After a specimen was subjected to solution treatment at 1 050 ℃ for 6 min, its mechanical properties were determined through tensile and hardness tests. Based on the true stress vs true strain and engineering stress vs engineering strain flow curves, the work hardening rate has been explored. The results show that the solution treated specimen has an excellent combination of strength and elongation, and that this steel is easy to work-hardening during deformation. Optical microscope, scanning electron micro- scope, transmission electron microscope and X-ray diffraction examinations were conducted, these reveal that twins in 316L austenitic stainless steel can be divided into suspended twin and transgranular twin which have different for mation mechanisms in growth, and that the deformation induced martensite nucleated and grown in the shear band intersections can be observed, and that the fracture surfaces are mainly composed of dimples and exhibit a tough fracture character.
参考文献
| [1] | Parr G;Hanson A.An Introduction to Stainless Steel[M].Materials Park:ASM,1965 |
| [2] | Erickson A R;Wiech R E.Metals Handbook[M].Materials Park..ASM Federation,1994 |
| [3] | Christian J W;Mahajan S .Deformation Twinning[J].Progress in Materials Science,1995,39:1. |
| [4] | Schramm R E;Reed R P .Stacking Fault Energies of Seven Commercial Austenitic Stainless Steels[J].Metallurgical and Materials Transactions,1975,6A:1345. |
| [5] | Sandip Ghosh Chowdhury;Samar Das;P.K. De .Cold roiling behaviour and textural evolution in AISI 316L austenitic stainless steel[J].Acta materialia,2005(14):3951-3959. |
| [6] | Kruml T;Polak J;Obrtlik K .Dislocation Structures in the Bands of Localised Cyclic Plastic Strain in Austenitic 316L and Austenitic-Ferritic Duplex Stainless Steels[J].Acta Metallurgica Et Materialia,1997,45:5145. |
| [7] | Gavribuk V;Petrov Y;Shanina B .Effect of Nitrogen on the Electron Structure and Stacking Fault Energy in Austenitic Stainless Steels[J].Materials Characterization,2006,55:537. |
| [8] | Ferreira P J;Miillner P .A Thermodynamic Model for the Stacking Fault Energy[J].Acta Materialia,1998,45:4479. |
| [9] | Scharam R E;Reed R P .Stacking Fault Energies of Austenitic Stainless Steels[J].Metallurgical and Materials Transactions,1975,6A:1345. |
| [10] | Bruno Guelorget;Manuel Francois;Cristian Vial-Edwards;Guillaume Montay;Laurent Daniel;Jian Lu .Strain rate measurement by Electronic Speckle Pattern Interferometry: A new look at the strain localization onset[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2006(1/2):234-241. |
| [11] | Kayak G L .Fe Mn-A1 Precipitation-Hardening Austenitic Al loys[J].Metal Science and Heat Treatment,1969,11:95. |
| [12] | Karaman I;Yapici G G;Chumlyakov Y I .Deformation Twin ning in Difficult to-Work Alloys During Severe Plastic De formation[J].Materials Science and Engineering,2005,410A:243. |
| [13] | Lee T H;Oh C S;Kim S J .Deformation Twinning in High Nitrogen Austenitic Stainless Steel[J].Acta Materialia,2007,55:3649. |
| [14] | HE Zi-rong;XIE Nian-suo;ZHANG Yong-hong .The Mor phology and Formation Mechanism of Annealing Twin in Me dium Carbon Steel[J].Journal of Shaanxi Institute of Technology,1996,12(03):1. |
| [15] | Tavares S S M;Neto J M;Silva M R .Magnetic Properties and α' Martensite Quantification in an AISI 301LN Stainless Steel Deformed by Cold Rolling[J].Materials Characterization,2008,59(07):901. |
| [16] | Lee Woei shyan;Lin Chi-feng;Liu Tsung-ju .Strain Rate Dependence of Impact Properties of Sintered 316L Stainless Steel[J].Journal of Nuclear Materials,2006,359:247. |
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