Vol.3 No.4 (July 2013)
Effects of Microstructures on Mechanical Behavior of Dual-Phases Steel
The ingots were rolled by 550 mills in laboratory and the different shapes and distributions of ferrite and martensite were obtained by changing the cooling process. The influence of the shape and distribution of ferrite and martensite on mechanical properties of dual phase steel was investigated. The results indicated that, the size of martensite is finer, and the distribution of martensite is more homogeneous in steel with the microstructure was mixed by polygonal ferrite, acicular ferrite and martensite than that of steel with the microstructure mixed by polygonal ferrite and martensite. Moreover, the values of yield strength, tensile strength and impact toughness increase apparently, the value of elongation decreases.
郭佳 , 姚志强 , 杜宇 , 刘杰 , 李飞 , 朱国森 (2013) 组织形貌对热轧双相钢力学行为影响。 材料科学， 3， 179-185. doi: 10.12677/MS.2013.34033
 G. Avramovic-Cingaraa. Micromechanical modeling of the effect of particle size difference in dual phase steels. International Journal of Solids and Structures, 2003, 40(13-14): 3379-3391.
 A. Kumar, S. B. Singh and K. K. Ray. Influence of bainite/ martensite-content on the tensile properties of low carbon dual- phase steels. Materials Science and Engineering A, 2008, 474(1-2): 270-282.
 G. Avramovic-Cingara, Y. Ososkov, M. K. Jain and D. S. Wil- kinson. Effect of martensite distribution on damage behaviour in DP600 dual phase steels. Materials Science and Engineering A, 2009, 516(1-2): 7-16.
 M. Yang, Y. J. Chao, X. D. Li and J. Z. Tan. Splitting in dual- phase 590 high strength steel plates. Part I. Mechanisms Materi- als Science and Engineering A, 2008, 497(1-2): 451-461.
 P. Movahed, S. Kolahgar, S. P. H. Marashi, M. Pouranvari and N. Parvina. The effect of intercritical heat treatment temperature on the tensile properties and work hardening behavior of ferrite- martensite dual phase steel sheets. Materials Science and Engi- neering A, 2009, 518: 1-6.
 M. Calcagnotto, D. Ponge and D. Raabe. Effect of grain refine- ment to 1 μm strength and toughness of dual-phase steels. Mate- rials Science and Engineering A, 2010, 527(13-14): 7832-7840.