Journal ArticleDOI
Effect of high strain rate deformation on microstructure of strip steels tested under dynamic tensile conditions
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TLDR
In this paper, the correlation between low and high strain rate deformation characteristics and the microstructure of novel strip steel products employed by the automotive industry has been assessed and the results obtained indicate that the dual phase steel grades having similar microstructures, although with varying strength levels, displayed the same response to high strain-rate loading conditions.Abstract:
The correlation between low and high strain rate deformation characteristics and the microstructure of novel strip steel products employed by the automotive industry has been assessed. Research has been carried out to establish whether microstructural changes during high speed deformation could explain the relative attributes of mild steel, carbon manganese steel and novel dual phase steel grades of increasing yield and tensile strength, in relation to their crash behaviour. The results obtained indicate that the dual phase steel grades having similar microstructures, although with varying strength levels, displayed the same response to high strain rate loading conditions. They both exhibited a reduction in the level of hardness at high strain rate compared with low strain rate deformation. The strain rate softening effect observed with the dual phase steel was accompanied by an increase in plastic deformation of the ferrite areas around the martensitic constituent regions.read more
Citations
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Journal ArticleDOI
Effects of weld microstructure on static and impact performance of resistance spot welded joints in advanced high strength steels
M. I. Khan,M. L. Kuntz,Y. Zhou +2 more
TL;DR: In this article, the fracture paths within the joint microstructure of spot welded AHSS, including dual phase (DP), transformation induced plasticity (TRIP), and ferritic-bainitic (FB), were compared to new high strength low alloy steels.
Journal ArticleDOI
Dual phase versus TRIP strip steels : Microstructural changes as a consequence of quasi-static and dynamic tensile testing
TL;DR: Oliver et al. as discussed by the authors examined the change in microstructure of a range of both commercial and experimental dual phase and transformation induced plasticity (TRIP) strip steel grades, which were tensile tested at low (0.001 − 1) and very high strain rates (200 − − 1).
Journal ArticleDOI
Experimental study on high strain rate behavior of high strength 600–1000 MPa dual phase steels and 1200 MPa fully martensitic steels
TL;DR: In this article, a split Hopkinson tensile bar (SHTB) setup was used to compare the strain rate sensitivity of dual phase (DP) and fully martensitic (MS) steel sheets.
Journal ArticleDOI
Micromechanisms of deformation in dual phase steels at high strain rates
TL;DR: In this article, the effect of strain rate on the micro-mechanisms of deformation in dual-phase steels was investigated and it was shown that the volume fraction and size of the martensite played an important role in the deformation at different strain rates.
Journal ArticleDOI
Strain Rate and Temperature Effects on the Formability and Damage of Advanced High-Strength Steels
S. Winkler,Alan Thompson,Alan Thompson,C.P. Salisbury,Michael J. Worswick,I. Van Riemsdijk,Robert R. Mayer +6 more
TL;DR: In this paper, the effects of strain rate and temperature on the constitutive response of advance high-strength steels were investigated and compared with commercial drawing quality (DQ) and high strength low alloy (HSLA) 350 steel tubes.
References
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Book
The Quantitative Description of the Microstructure of Materials
TL;DR: In this article, a method for estimating the density of volume elements by a method of size distribution reconstruction is presented. But the method is limited to the case of 2D lines on a plane.
Book
Steels: Metallurgy and Applications
TL;DR: Technological trends in the steelmaking industry low carbon strip steels low carbon structural steels engineering steels steels stainless steels as mentioned in this paper have been studied in the past few decades.
Journal Article
Dual phase steels
D. T. Llewellyn,D. J. Hillis +1 more
TL;DR: In this article, a microstructure consisting essentially of ferrite plus about 20% martensite can be developed in suitable steel compositions and provides a very attractive combination of mechanical properties.
Journal ArticleDOI
Effect of microstructure on mechanical properties of C-Mn high strength hot rolled sheet steel.
TL;DR: In this paper, the effect of the microstructure of C-Mn steels on mechanical properties is discussed comparing them with low C-Nb bearing steel, and it was improved by changing the micro-structure to ferrite-bainite.