scholarly journals Mechanical performance and formability of laser-welded dissimilar butt joints between medium-Mn stainless steel and high-strength carbon steel

2021 ◽  
pp. 142200
Author(s):  
Atef Hamada ◽  
Mohammed Ali ◽  
Sumit Ghosh ◽  
Matias Jaskari ◽  
Markku Keskitalo ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
Mechanical Performance ◽  
High Strength ◽  
Butt Joints

Fiber element modeling of circular double-skin concrete-filled stainless-carbon steel tubular columns under axial load and bending

2022 ◽  
pp. 136943322110651
Author(s):  
Mizan Ahmed ◽  
Qing Quan Liang ◽  
Ahmed Hamoda
Keyword(s):  
Stainless Steel ◽  
Carbon Steel ◽  
High Performance ◽  
Mechanical Performance ◽  
Axial Strain ◽  
High Strength ◽  
Offshore Structures ◽  
Numerical Results ◽  
Beam Columns ◽  
Double Skin

Circular concrete-filled double-skin steel tubular (CFDST) columns with external stainless-steel are high-performance composite columns that have potential applications in civil construction including the construction of offshore structures, bridge piers, and transmission towers. Reflecting the limited research performed on investigating their mechanical performance, this study develops a computationally efficient fiber model to simulate the responses of short and slender beam-columns accounting for the influences of material and geometric nonlinearities. Accurate material laws of stainless steel, carbon steel, and confined concrete are implemented in the mathematical modeling scheme developed. A new solution algorithm based on the Regula-Falsi method is developed to maintain the equilibrium condition. The independent test results of short and slender CFDST beam-column are utilized to validate the accuracy of the theoretical solutions. The influences of various column parameters are studied on the load-axial strain [Formula: see text] curves, load-lateral deflection [Formula: see text] curves, column strength curves, and interaction curves of CFDST columns. Design formulas are suggested for designing short and beam-columns and validated against the numerical results. The computational model is found to be capable of simulating the responses of CFDST short and slender columns reasonably well. Parametric studies show that the consideration of the concrete confinement is important for the accuracy of the prediction of their mechanical responses. Furthermore, high-strength concrete can be utilized to enhance their load-carrying capacity particularly for short and intermediate slender beam-columns. The strengths of CFDST columns computed by the suggested design model are in good agreement with the test and numerical results.

scholarly journals Evolution of Microstructure and Hardness of High Carbon Steel under Different Compressive Strain Rates

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 580 ◽  
Author(s):  
Rumana Hossain ◽  
Farshid Pahlevani ◽  
Veena Sahajwalla
Keyword(s):  
Carbon Steel ◽  
Phase Stability ◽  
Mechanical Performance ◽  
Compressive Strain ◽  
High Carbon Steel ◽  
High Hardness ◽  
High Strength ◽  
Strain Rates ◽  
High Carbon ◽  
Industrial Grade

Understanding the effect of high strain rate deformation on microstructure and mechanical property of metal is important for addressing its performance as high strength material. Strongly motivated by the vast industrial application potential of metals having excellent hardness, we explored the phase stability, microstructure and mechanical performance of an industrial grade high carbon steel under different compressive strain rates. Although low alloyed high carbon steel is well known for their high hardness, unfortunately, their deformation behavior, performance and microstructural evolution under different compressive strain rates are not well understood. For the first time, our investigation revealed that different strain rates transform the metastable austenite into martensite at different volume, simultaneously activate multiple micromechanisms, i.e., dislocation defects, nanotwining, etc. that enhanced the phase stability and refined the microstructure, which is the key for the observed leap in hardness. The combination of phase transformation, grain refinement, increased dislocation density, formation of nanotwin and strain hardening led to an increase in the hardness of high carbon steel.

UGI 4418 AIR

Alloy Digest ◽  
2018 ◽  
Vol 67 (10) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Tensile Properties ◽  
Mechanical Performance ◽  
Martensitic Stainless Steel ◽  
High Strength ◽  
Heat Treating ◽  
High Toughness

Abstract UGI 4418 AIR is a martensitic stainless steel with strong corrosion resistance and mechanical performance. It is used for parts requiring a combination of high strength and high toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming and heat treating. Filing Code: SS-1296. Producer or source: Schmolz + Bickenbach USA Inc..

Evaluation of Stainless Steel Fasteners for Bolted Field Splice Connections of ASTM A1010 Corrosion-Resistant Steel Plate Girders

2017 ◽  
Vol 2630 (1) ◽  
pp. 85-94 ◽  
Author(s):  
Thomas R. Williams ◽  
Xuemeng Xia ◽  
Thomas E. Darby ◽  
Stephen R. Sharp
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Steel Plate ◽  
Mechanical Performance ◽  
High Strength ◽  
Department Of Transportation ◽  
Plate Girders ◽  
Tension Tests ◽  
Virginia Department ◽  
The Cost

The Virginia Department of Transportation, Richmond, initiated this study to compare the mechanical properties, availability, and costs of stainless steel fastener materials for use with ASTM A1010 stainless steel plate. The investigation focused on fastener materials included in ASTM A193 and compared them with ASTM A325 bolts. The ASTM A193 bolts tested were the B6, B8, and B8M. Test results indicated that the ASTM A193 B8 fasteners provided the most economic combination of mechanical strength, corrosion resistance, and cost. Uniaxial tension tests and Skidmore–Wilhelm rotational capacity tests revealed that the B6 fasteners had high strength but lower ductility, whereas the B8M fasteners had lower strength but higher ductility. The B8 fastener had an ideal combination of strength and ductility. The mechanical performance of the ASTM A193 fasteners was improved further by the use of hardened washers. Because the bolts are hot forged, sensitization, which can reduce corrosion resistance, was of concern. Standard testing indicated that the B8 and B8M as-received bolts were unsensitized. The cost of the B8 fasteners compared favorably with that of other stainless steel fasteners. Further, the B8 fasteners are available from manufacturers that comply with Buy America requirements. The cost of stainless steel fasteners is higher than that of ASTM A325 steel fasteners. As their use increases, however, larger orders may help reduce prices. The initial research indicates that stainless fasteners could be a structurally sound option to use to build reduced maintenance bridges.

scholarly journals Microstructure Characterization and Mechanical Properties of Stainless Steel Clad Plate

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 509 ◽  
Author(s):  
Hao Li ◽  
Liyuan Zhang ◽  
Boyang Zhang ◽  
Qingdong Zhang
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Diffusion Layer ◽  
Mechanical Performance ◽  
Carbon Diffusion ◽  
Thickness Direction ◽  
Strong Bond ◽  
Microstructure And Mechanical Properties ◽  
Stainless Steel Clad Plate

In this study the microstructure and mechanical properties of stainless steel clad plate are researched. Due to element diffusion (Fe, Cr, Ni, Mn), a 20 μm thick diffusion layer is formed between stainless steel and carbon steel clad plate. The diffusion layer has a stable mechanical performance without obvious grain microstructure, and its internal mechanical properties show a graded change in the thickness direction. This is beneficial to a strong bond between stainless steel and carbon steel and the stable transition of mechanical performance in the thickness direction, as well as further carbon diffusion changes in the microstructure and mechanical properties near the diffusion layer of clad plate. Carburization stainless steel with a thickness of 150 μm is formed in the stainless steel side and decarburization carbon steel with a thickness of 80 μm is formed in the carbon steel side.

scholarly journals Laser Welding of New Grade of Advanced High Strength Steel STRENX 1100 MC

2017 ◽  
Vol 62 (3) ◽  
pp. 1651-1657 ◽  
Author(s):  
A. Kurc-Lisiecka ◽  
J. Piwnik ◽  
A. Lisiecki
Keyword(s):  
Laser Welding ◽  
Base Metal ◽  
Mechanical Performance ◽  
High Strength ◽  
Carbon Equivalent ◽  
Welding Parameters ◽  
Low Carbon ◽  
Butt Joints ◽  
Significant Drop ◽  
Metal Impact

AbstractThe article presents results of investigations on autogenous laser welding of new grade STRENX 1100 MC steel. The modern Disk laser was applied for of 5.0 mm thick butt joints welding. The influence of laser welding parameters, mainly the energy input of laser welding on the penetration shape, weld quality, structure and mechanical performance was investigated. It was found that the investigated steel has surprisingly low carbon equivalent CET just 0.328, and also relatively high temperature of martensitic transformation Msat 430.6°C. Despite very rapid cooling times t8/5in a range from 0.6 to 1.3 s, thus rapid solidification there was no tendency to cracking of weld metal or HAZ. Significant drop of microhardness in the HAZ resulted in a decrease of tensile strength of joints, compared to the base metal. Impact toughness of test joints was at only 50÷60% of the base metal.

scholarly journals Study on the Mechanical Performance of Dissimilar Butt Joints between Low Ni Medium-Mn and Ni-Cr Austenitic Stainless Steels Processed by Gas Tungsten Arc Welding

Metals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1439
Author(s):  
I. Reda Ibrahim ◽  
Mahmoud Khedr ◽  
Tamer S. Mahmoud ◽  
Hamed A. Abdel-Aleem ◽  
Atef Hamada
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Arc Welding ◽  
Mechanical Performance ◽  
Gas Tungsten Arc Welding ◽  
Uniaxial Tensile ◽  
Butt Joints ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

In the present work, dissimilar butt joints between a low-Ni, medium-Mn austenitic stainless steel, M-Mn SS, and a Ni-Cr austenitic stainless steel, Ni-Cr SS, were processed by utilizing the gas tungsten arc welding (GTAW) technique at different heat inputs. A filler metal of ER308 was employed in the welding process. The filler yields 480 MPa, which is equivalent to the yield strength of M-Mn SS. The microstructural analysis and mechanical performance (i.e., tensile strength and hardness properties) of the concerned joints were studied by using an optical microscope and uniaxial tensile tests, respectively. The results revealed that a duplex structure from austenite matrix and delta ferrite is promoted in the fusion zone (FZ) of the dissimilar joints processed with low and high energy inputs (0.486 kJ/mm and 0.558 kJ/mm). The FZ of the specimens welded at high heat input exhibited the lowest hardness value (151.2 HV) in comparison to heat affected zone (HAZ) (166.3 HV). Moreover, the joints exhibited a low tensile strength of 610 MPa. The achieved strength is significantly lower than the strengths of the base metals (BMs) M-Mn SS and Ni-Cr SS. This is mainly attributed to the inhomogeneous dendritic structure of the FZ with Cr-carbides precipitation.

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