Microstructure, texture, grain boundary characteristics and mechanical properties of a cold rolled and annealed ferrite–bainite dual phase steel

2010 ◽  
Vol 101 (10) ◽  
pp. 1252-1263 ◽  
Author(s):  
Chiradeep Ghosh ◽  
Arunansu Haldar ◽  
Pampa Ghosh ◽  
Ranjit Kumar Ray
Keyword(s):  
Mechanical Properties ◽  
Grain Boundary ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Grain Boundary Characteristics ◽  
Cold Rolled ◽  
Boundary Characteristics

Research in an Original Si-Mn-Mo-Nb 800MPa Dual Phase Steel with Low Carbon

2014 ◽  
Vol 1052 ◽  
pp. 51-54 ◽  
Author(s):  
Hui Wang ◽  
Kuan Hui Hu ◽  
Cheng Jiang Lin ◽  
Li Bo Pan ◽  
Zhong Chao Ye
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Grain Boundary ◽  
Dual Phase Steel ◽  
Total Elongation ◽  
Dual Phase ◽  
Low Carbon ◽  
Cold Rolled ◽  
High Silicon

In this Paper an original 800MPa cold rolled dual phase steel with low carbon and high silicon as well as some amount of Mn had been investigated in lab. The study shows that the microstructures of the steel mainly consist of ferrite, along with martensite with the content of 20%~25% which distributes homogenously on the ferrite grain boundary. The grain size of the ferrite is homogenous and with the grade of 13-14. The characteristics of the microstructure results in the excellent mechanical properties of the steel with Rp0.2=485~515MPa,tensile strength Rm=795~805MPa,total elongation A80mm=18%~19.5%,and n=0.135-0.145.

scholarly journals Microstructure and Mechanical Properties of a Cold-Rolled Ultrafine-Grained Dual-Phase Steel

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1399 ◽  
Author(s):  
Zhiyi Pan ◽  
Bo Gao ◽  
Qingquan Lai ◽  
Xuefei Chen ◽  
Yang Cao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dual Phase Steel ◽  
Uniform Elongation ◽  
Processing Route ◽  
Dual Phase ◽  
Dp Steel ◽  
Ultrafine Grained ◽  
Superior Mechanical Properties ◽  
Cold Rolled ◽  
New Processing

A new processing route to produce Ultrafine-Grained Dual-Phase steel has been proposed, involving cold-rolling and subsequent intercritical annealing of a fibrous ferrite–martensite starting structure. Ultrafine-grained DP (UFG-DP) steel with an average ferrite grain size of about ~2.7 μm and an average martensite island size of ~2.9 μm was achieved. Tensile testing revealed superior mechanical properties (the ultimate tensile strength of 1267 MPa and uniform elongation of 8.2%) for the new DP steel in comparison with the fibrous DP steels. The superior mechanical properties are attributed to the influence of microstructure refinement on the work-hardening and fracture behavior.

Study of the Difference in Microstructures and Properties of Cold Rolled Dual Phase Steel with Different Composition

2012 ◽  
Vol 251 ◽  
pp. 351-354
Author(s):  
Hui Wang ◽  
Cheng Jiang Lin ◽  
Zhao Jun Deng ◽  
Ji Bin Liu
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Yield Strength ◽  
Grain Boundaries ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
High Tensile Strength ◽  
Cold Rolled ◽  
The Difference

The difference in microstructures and properties of 600MPa cold rolled dual phase steel with the different composition had been studied in this paper. It can be noticed that the Si-Mn-Cr steel have finer ferrite and more martensite whose content is about 25%; the Mn-Cr-Mo steel have coarser ferrite and some coarse pearlite as well as little martensite; the microstructures of the Mn-Al-Mo steel are consist of mainly ferrite which have even grain size and 16% martensite which distributed homogenously along the ferrite grain boundaries. The difference in microstructure makes the steel own the different properties. The Si-Mn-Cr steel has the highest tensile strength and yield strength but the worst elongation, the Mn-Cr-Mo steel has the lowest tensile strength, the Mn-Al-Mo steel has the an excellent mechanical properties with low yield strength and high tensile strength as well as higher elongation.

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