Microstructures and mechanical properties of dual phase steel produced by laboratory simulated strip casting

Z. P. Xiong; A. G. Kostryzhev; N. E. Stanford; E. V. Pereloma

doi:10.1016/j.matdes.2015.09.031

Microstructures and mechanical properties of dual phase steel produced by laboratory simulated strip casting

Z. P. Xiong^*, A. G. Kostryzhev, N. E. Stanford, E. V. Pereloma

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

66 Citations (Scopus)

Abstract

Conventional dual phase (DP) steel (0.08C-0.81Si-1.47Mn-0.03Al wt.%) was manufactured using simulated strip casting schedule in laboratory. The average grain size of prior austenite was 117. ±. 44. μm. The continuous cooling transformation diagram was obtained. The microstructures having polygonal ferrite in the range of 40-90%, martensite with small amount of bainite and Widmanstätten ferrite were observed, leading to an ultimate tensile strength in the range of 461-623. MPa and a corresponding total elongation in the range of 0.31-0.10. All samples exhibited three strain hardening stages. The predominant fracture mode of the studied steel was ductile, with the presence of some isolated cleavage facets, the number of which increased with an increase in martensite fraction. Compared to those of hot rolled DP steels, yield strength and ultimate tensile strength are lower due to large ferrite grain size, coarse martensite area and Widmanstätten ferrite.

Original language	English
Pages (from-to)	537-549
Number of pages	13
Journal	Materials and Design
Volume	88
DOIs	https://doi.org/10.1016/j.matdes.2015.09.031
Publication status	Published - 25 Dec 2015
Externally published	Yes

Keywords

Continuous cooling transformation diagram
Crussard-Jaoul model
Dual phase steel
Electron microscopy
Mechanical properties
Strip casting

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10.1016/j.matdes.2015.09.031

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title = "Microstructures and mechanical properties of dual phase steel produced by laboratory simulated strip casting",

abstract = "Conventional dual phase (DP) steel (0.08C-0.81Si-1.47Mn-0.03Al wt.%) was manufactured using simulated strip casting schedule in laboratory. The average grain size of prior austenite was 117. ±. 44. μm. The continuous cooling transformation diagram was obtained. The microstructures having polygonal ferrite in the range of 40-90%, martensite with small amount of bainite and Widmanst{\"a}tten ferrite were observed, leading to an ultimate tensile strength in the range of 461-623. MPa and a corresponding total elongation in the range of 0.31-0.10. All samples exhibited three strain hardening stages. The predominant fracture mode of the studied steel was ductile, with the presence of some isolated cleavage facets, the number of which increased with an increase in martensite fraction. Compared to those of hot rolled DP steels, yield strength and ultimate tensile strength are lower due to large ferrite grain size, coarse martensite area and Widmanst{\"a}tten ferrite.",

keywords = "Continuous cooling transformation diagram, Crussard-Jaoul model, Dual phase steel, Electron microscopy, Mechanical properties, Strip casting",

author = "Xiong, {Z. P.} and Kostryzhev, {A. G.} and Stanford, {N. E.} and Pereloma, {E. V.}",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

month = dec,

day = "25",

doi = "10.1016/j.matdes.2015.09.031",

language = "English",

volume = "88",

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journal = "Materials and Design",

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T1 - Microstructures and mechanical properties of dual phase steel produced by laboratory simulated strip casting

AU - Xiong, Z. P.

AU - Kostryzhev, A. G.

AU - Stanford, N. E.

AU - Pereloma, E. V.

PY - 2015/12/25

Y1 - 2015/12/25

N2 - Conventional dual phase (DP) steel (0.08C-0.81Si-1.47Mn-0.03Al wt.%) was manufactured using simulated strip casting schedule in laboratory. The average grain size of prior austenite was 117. ±. 44. μm. The continuous cooling transformation diagram was obtained. The microstructures having polygonal ferrite in the range of 40-90%, martensite with small amount of bainite and Widmanstätten ferrite were observed, leading to an ultimate tensile strength in the range of 461-623. MPa and a corresponding total elongation in the range of 0.31-0.10. All samples exhibited three strain hardening stages. The predominant fracture mode of the studied steel was ductile, with the presence of some isolated cleavage facets, the number of which increased with an increase in martensite fraction. Compared to those of hot rolled DP steels, yield strength and ultimate tensile strength are lower due to large ferrite grain size, coarse martensite area and Widmanstätten ferrite.

AB - Conventional dual phase (DP) steel (0.08C-0.81Si-1.47Mn-0.03Al wt.%) was manufactured using simulated strip casting schedule in laboratory. The average grain size of prior austenite was 117. ±. 44. μm. The continuous cooling transformation diagram was obtained. The microstructures having polygonal ferrite in the range of 40-90%, martensite with small amount of bainite and Widmanstätten ferrite were observed, leading to an ultimate tensile strength in the range of 461-623. MPa and a corresponding total elongation in the range of 0.31-0.10. All samples exhibited three strain hardening stages. The predominant fracture mode of the studied steel was ductile, with the presence of some isolated cleavage facets, the number of which increased with an increase in martensite fraction. Compared to those of hot rolled DP steels, yield strength and ultimate tensile strength are lower due to large ferrite grain size, coarse martensite area and Widmanstätten ferrite.

KW - Continuous cooling transformation diagram

KW - Crussard-Jaoul model

KW - Dual phase steel

KW - Electron microscopy

KW - Mechanical properties

KW - Strip casting

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DO - 10.1016/j.matdes.2015.09.031

M3 - Article

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SN - 0264-1275

VL - 88

SP - 537

EP - 549

JO - Materials and Design

JF - Materials and Design

ER -

Microstructures and mechanical properties of dual phase steel produced by laboratory simulated strip casting

Abstract

Keywords

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