|
|
|
| Mechanical Properties of High-strength V-microalloyed TRIP-aided Sheet Steel with Bainitic Ferrite Matrix |
| XU Yunbo1, HOU Xiaoying1, WANG Yeqin 2, WU Di1 |
1.State Key Laboratory of Rolling Technology & Automation, Northeast University, Shenyang 110819
2.Laiwu Iron and Steel Corp., Laiwu 271104 |
|
Cite this article:
XU Yunbo HOU Xiaoying WANG Yeqin WU Di. Mechanical Properties of High-strength V-microalloyed TRIP-aided Sheet Steel with Bainitic Ferrite Matrix. Chin J Mater Res, 2012, 26(2): 175-180.
|
|
|
Abstract The microstructural characteristics and mechanical properties of a V-microalloyed TRIP steel after cold rolling and continuous annealing were investigated. The results show that the microstructure of TRIP steel with bainitic ferrite matrix is composed of bainitic/martensite and a small amount of retained austenite. With increasing the bainite holding time, the yield strength and elongation rate of the tested material increase, and the tensile strength decreases. The blocky retained austenites mostly turn into 50-90 nm flims between bainite laths and the volume fraction of retained austenite increases. When holding at 400oC for 180 s, a relatively low tensile strength (960MPa), high yield strength (765MPa) and elongation rate (22.0%) of continuous annealing sheet steel can be obtained, and strain-hardening exponent (0.20), anisotropy exponent (0.94) and tensile strength–plastic performance (21120 MPa.%) are excellent.
|
|
Received: 30 August 2011
|
|
|
| Fund: Supported by the National Natural Science Foundation of China No.50734001, the National Key Project of Scientific and Technical Supporting Programs No.2007BAE51B07 and The Fundamental Research Funds for the Central Universities No.110407003. |
| 1 M.De Meyer, D.Vanderschueren, B.C.De Cooman, The influence of the substitution of Si by Al on the properties of cold rolled C-Mn-Si TRIP steels, ISIJ International, 39(8), 813(1999)2 Y.Chen, L.H.Wang, L.G.Dong, F.P.Li, Y.Zhang, Effects of Aluminum on microstructures and mechanical properties of hot-rolled TRIP steels, Proceedings of Sino-Swedish Structural Materials Symposium, 368(2007)3 P.J.Jacques, E.Girault, A.Mertens, B.Verlinden, J.van Humbeeck, F.Delannay, The development of cold-rolled TRIP-assisted multiphase steels, Al-alloyed TRIP-assisted multiphase steels, ISIJ International, 41(9), 1068(2001)4 J.Mahieu, J.Maki, B.C.De Cooman, S.Claessens, Phase transformation and mechanical properties of Si-free CMnAl transformation-induced plasticity-aided steel, Metallur Mater Trans A, 33A, 2573(2002)5 J.Maki, J.Mahieu, B.C.De Cooman, S.Claessens, Galvanisability of silicon-free CMnAI TRIP steels, Mater Sci Technol, 19, 125(2003)6 B.C.De Cooman, Structure–properties relationship in TRIP steels containing carbide-free bainite, Current Opinion in Solid State and Materials Science, 8, 285(2004)7 Y.Sakuma, O.Matsumura, O.Akisue, Influence of C content and annealing temperature on microstructure and mechanical properties of 400 transformed steel containing retained austenite, ISIJ International, 31(11), 1348(1991)8 A.Basuki, E.Aernoudt, Effect of deformation in the intercritical area on the grain refinement of retained austenite of 0.4C TRIP steel, Scipta Materialia, 40, 1003(1999) 9 S.C.Balk, S.Kim, Y.S.Jin, O.Kwon, Effects of alloying elements on mechanical properties and phase transformation of cold rolled TRIP steel sheets, ISIJ International, 41(3), 290(2001)10 R.C.Thomson, M.K.Miller, Carbide precipitation in martensite during the early stages of tempering Cr−and Mo-containing low alloy steels, Acta Mater, 46(6), 2203(1998)11 S.J.Kim, C.G.Lee, T.H.Lee, C.S.Oh, Effects of copper addition on mechanical properties of 0.15C–1.5Mn–1.5Si TRIP-aided multiphase cold-rolled steel sheets, ISIJ International, 42(12), 1452(2002)12 E.V.Pereloma, I.B.Timokhina, P.D. Hodgson, Transformation behaviour in thermomechanically processed C–Mn–Si TRIP steels with and without Nb, Materials Science and Engineering A, 273-275, 448(1999)13 E.V.Pereloma, K.F.Russell, M.K.Miller, I.B.Timokhina, Effect of pre-straining and bake hardening on the microstructure of thermomechanically processed CMnSi TRIP steels with and without Nb and Mo additions, Scripta Materialia, 58, 1078(2008)14 S.Jiao, F.Hassani, R.L.Donaberger, E.Essadiqi, S.Yue, The effect of processing history on a cold rolled and annealed Mo–Nb microalloyed TRIP steel, ISIJ International, 42(3), 299(2002)15 E.Jimenez-Melero, N.H.van Dijk, L.Zhao, J.Sietsma, S.E.Offerman, J.P.Wright, S.van der Zwaag,The effect of aluminium and phosphorus on the stability of individual austenite grains in TRIP steels, Acta Materialia, 57, 533(2009)16 H.C.Chen, H.Era, M.Shimizu, Effect of phosphorus on the formation of retained uastenite and mechanical properties in Si-containing low-carbon steel sheet,Metallurgical Transacyions, 20A, 437(1989)17 K.I.Sugimoto, M.Tsunezawa, T.Hojo, S.Ikeda, Ductility of 0.1–0.6C–1.5Si–1.5Mn ultra high–strength TRIP–aided sheet steels with bainitic ferrite Matrix, ISIJ International, 44(9), 1608(2004)18 K.I.Sugimoto, K.Nakano, S.M.Song, T.Kashima, Retained austenite characteristics and stretch-flangeability of highstrength low-alloy TRIP type bainitic sheet steels, ISIJ International, 42(4), 450(2002)19 K.I.Sugimoto, T.Iida, J.Sakaguchi, T. Kashima, Retained austenite characteristics and tensile properties in a TRIP type bainitic sheet steel, ISIJ International, 40(9), 902(2000)20 K.I.Sugimoto, J.Sakaguchi, T.Iida, T.Kashima, Stretchflangeability of a high-strength TRIP type bainitic sheet steel, ISIJ International, 40(9), 920(2000) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
