Journal ArticleDOI
Low temperature impact toughness of high strength structural steel
Reads0
Chats0
TLDR
In this article, the impact toughness properties of four kinds of high strength steel (HSS) were investigated with the nominal yield strength 460, 690, 800 and 960 MPa, respectively.Abstract:
Impact toughness properties of four kinds of high strength steel (HSS) were investigated with the nominal yield strength 460, 690, 800 and 960 MPa, respectively. The specialty of impact toughness among base metal, heat affected zone (HAZ) and weld metal were also compared and discussed. The correlations between the impact toughness of HSS and their nominal yield strength, plate thicknesses, testing temperature, welding methods were further studied. Combined with the scanning electron microscope (SEM) fracture surface observation, the microstructural features and corresponding fracture mechanisms have been analyzed. The results show that the impact toughness for HSS base metal deteriorated with the increasing nominal yield strength. The impact toughness of weld metal for HSS is much lower than that of the corresponding base metal. The impact performance of HAZ is discretized due to the welding thermal cycling on the HAZ where significant changes in grain structure and properties occur. The microcosmic fracture surface of HSS is examined to explain the reduction in impact performance under low temperature.read more
Citations
More filters
Journal ArticleDOI
Effects of heat input on the mechanical properties of butt-welded high and ultra-high strength steels
Mohsen Amraei,Mohsen Amraei,Antti Ahola,Shahriar Afkhami,Timo Björk,Amin Heidarpour,Xiao Ling Zhao +6 more
TL;DR: In this paper, the mechanical properties of butt-welded thin plates made of S700, S960 and S1100 steels under various heat inputs (HI) are investigated and the microstructure of the heat affected zones (HAZ) of the weldments are closely examined using scanning electron microscopy (SEM).
Journal ArticleDOI
Mechanical properties and microstructural evaluation of the heat-affected zone in ultra-high strength steels
Mohsen Amraei,Mohsen Amraei,Shahriar Afkhami,Vahid Javaheri,Jari Larkiola,Tuomas Skriko,Timo Björk,Xiao Ling Zhao +7 more
TL;DR: In this paper, the mechanical properties of ultra-high strength steels (UHSSs) with nominal yield stress of 960 and 1100 MPa after welding were investigated. And the results showed that the S960, a direct-quenched type of steel, showed a considerable reduction in its hardness and tensile strength up to 29 and 32%, respectively.
Journal ArticleDOI
Effects of pre-fatigue damage on mechanical properties of Q690 high-strength steel
TL;DR: In this article, the residual strength of Q690 high-strength steel previously damaged by fatigue was investigated, and a set of predictive equations were proposed to determine the residual mechanical properties of pre-fatigue damage.
Journal ArticleDOI
The effect of laser scanning speed on microstructural evolution during direct laser deposition 12CrNi2 alloy steel
TL;DR: In this paper, the effect of different laser scanning speed (4mm/s, 5mm/m2, 6 mm/s and 7 mm/n) on the microstructural evolution of direct laser deposition (DLD) 12CrNi2 alloy steel was analyzed.
Journal ArticleDOI
Effect of microstructure on the Charpy impact properties of directed energy deposition 300M steel
TL;DR: In this article, the microstructure evolution and impact toughness of DED 300M ultra-high strength steel are investigated, and it is shown that the micro-segregation of elements is observed within the interdendritic area.
References
More filters
Journal ArticleDOI
High strength Fe–Mn–(Al, Si) TRIP/TWIP steels development — properties — application
TL;DR: In this paper, the formation of twins, α- and e- martensite during plastic deformation was analyzed by optical microscopy, X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscope (TEM).
Journal ArticleDOI
Tests of high strength steel columns
TL;DR: In this article, a test program on columns fabricated from high strength steel plates with nominal yield stress of 690 MPa was described and compared with column design strengths of the Australian steel structures standard AS4100, the Load and Resistance Factor Design Specification of the American Institute of Steel Construction, The British Standard BS5950: Part 1, and the draft European Committee for Standardisation (CEN) Eurocode3.
Journal ArticleDOI
Development and use of high performance steel
TL;DR: A brief review of early steel developments is presented in this paper, but the major focus of the paper is today's requirements for high performance steels, including the properties of tensile strength and stiffness, ductility, toughness, weldability and corrosion resistance.
Journal ArticleDOI
Ductile to brittle transition of an A508 steel characterized by Charpy impact test: Part I: experimental results
TL;DR: In this article, the ductile-brittle transition behavior of a French A508 Cl3 (16MND5) steel with Charpy V-notch test in this range of temperature was investigated.
Journal ArticleDOI
Effect of microstructure on the yield ratio and low temperature toughness of linepipe steels
TL;DR: In this paper, the effects of microstructural features on the yield ratio and toughness of high strength linepipe steels have been investigated, and the optimum microstructure for a better combination of strength, toughness and yield ratio is suggested to be the one having second phase of polygonal ferrite in an acicular ferrite or bainite matrix.
Related Papers (5)
Toughness of SA738Gr.B steel used for nuclear containment vessel
Honghai Liu,Huiwen Zhang,Jing Li +2 more