Study on the correlation of toughness with chemical composition and tensile test results in microalloyed API pipeline steels

Pouraliakbar, Hesam; Khalaj, Gholamreza; Jandaghi, Mohammad Reza; Khalaj, Mohammad-Javad

doi:10.2298/jmmb140525025p

Cited by 37 publications

(14 citation statements)

References 10 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The atoms of Cr, Mo and Ni in the weld metal can be remelted at a high temperature, which can replace Fe atoms in the lattice and disturb the original lattice arrangement, and can also make dislocation movement difficult and strengthen the joint. As in HSLA steel, the addition of Mn and other alloying elements, such as copper (Cu), titanium (TI) and vanadium (V), both provide strengthening and an obtain ideal microstructure [26,27];…”

Section: Charpy V-notch Impact Testsmentioning

confidence: 99%

Investigation on Microstructure and Properties of Duplex Stainless Steel Welds by Underwater Laser Welding with Different Shielding Gas

et al. 2021

View full text Add to dashboard Cite

Taking S32101 duplex stainless steel as the research object, underwater laser wire filling welding technology was used for U-groove filling welding. The influence of different shielding gas compositions on the ferrite content, microstructure, mechanical properties and pitting corrosion resistance was studied by simulating a water depth of 15 m in the hyperbaric chamber. The results show that, under the same process parameters, the size and proportion of austenite in the weld when using pure nitrogen as the shielding gas are larger than those protected by other shielding gases. In a mixed shielding gas, the increase in nitrogen content has little effect on the strength and toughness of the weld. Regardless of the shielding gas used, the base metal was the weakest part of the weld. At the same time, intermetallic inclusions have an adverse effect on the impact toughness of the weld. The pitting corrosion resistance of the welds depends on the Cr2N content in the heat-affected zone. The precipitation and enrichment of Cr2N causes local chromium deficiency, which is the main factor for the weak pitting corrosion ability of the heat-affected zone. Pure nitrogen protection has a better corrosion resistance than other gas protection.

show abstract

Section: Charpy V-notch Impact Testsmentioning

confidence: 99%

Investigation on Microstructure and Properties of Duplex Stainless Steel Welds by Underwater Laser Welding with Different Shielding Gas

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In addition to these two basic approaches, the use of so-called artificial neutral networks (ANN) in the material science has become more widespread in recent years, e.g., Pouraliakbar [35] developed an ANN model to predict the toughness of HSLA steel. Nowadays, in light of springback prediction, utilisation of ANN represents an alternative tool for springback prediction, especially regarding that in light of nonlinear recovery, FEM has become quite complicated to achieve reliable results as it is concluded, e.g., by [36].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Computational Model and Mesh Strategy on the Springback Prediction of the Sandwich Material

2022

View full text Add to dashboard Cite

The effect of the computational model and mesh strategy on the springback prediction of the thin sandwich material made of micro-alloyed steel was investigated in this paper. To verify the chosen computational strategy, a comparison of the experimentally obtained specimen (U-bending) with the FEA result was performed. The Vegter yield criterion combined both with the isotropic and kinematic hardening law was used for the calculation. In addition, the effect of the deformation mesh element (surface and volume) on the accuracy of the springback prediction was investigated. It was concluded that the choice of the volume deformation mesh does not significantly improve the accuracy of the results. Moreover, it is quite a time-consuming approach. The much greater influence was monitored by concerning the selection of hardening law, where the anisotropic one was more suitable to be used on the springback prediction of a given sandwich material.

show abstract

“…Further, Khalaj and Pouraliakbar et al investigated the correlation of passivation current density and potential using chemical composition and corrosion cell characteristics in HSLA steels by means of an artificial neural network approach, and the influence of physical and chemical parameters on toughness of pipeline steel is simulated by high-precision model. This provides a basis for the application and corrosion monitoring of pipeline steel [ 27 , 28 ]. A significant amount of research has also been reported by domestic and international scholars on the effects of capillary action [ 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Corrosion Behaviour of X70 Steel under the Action of Capillary Water in Saline Soils

Wei

Feng

et al. 2022

Materials

View full text Add to dashboard Cite

In this paper, the electrochemical corrosion behavior of X70 steel in saline soil under capillary water was simulated by a Geo-experts one-dimensional soil column instrument. A volumetric water content sensor and conductivity test were used to study the migration mechanism of water and salt (sodium chloride) under the capillary water. The electrochemical corrosion behavior of the X70 steel in the corrosion system was analyzed by electrochemical testing as well as the macroscopic and microscopic corrosion morphology of the steel. The test results showed that the corrosion behavior of X70 steel was significantly influenced by the rise of capillary water. In particular, the wetting front during the capillary water rise meant that the X70 steel was located at the three-phase solid/liquid/gas interface at a certain location, which worsened its corrosion behavior. In addition, after the capillary water was stabilized, the salts were transported with the capillary water to the top of the soil column. This resulted in the highest salt content in the soil environment and the most severe corrosion of the X70 steel at this location.

show abstract

Study on the correlation of toughness with chemical composition and tensile test results in microalloyed API pipeline steels

Cited by 37 publications

References 10 publications

Investigation on Microstructure and Properties of Duplex Stainless Steel Welds by Underwater Laser Welding with Different Shielding Gas

Investigation on Microstructure and Properties of Duplex Stainless Steel Welds by Underwater Laser Welding with Different Shielding Gas

Effect of the Computational Model and Mesh Strategy on the Springback Prediction of the Sandwich Material

Electrochemical Corrosion Behaviour of X70 Steel under the Action of Capillary Water in Saline Soils

Contact Info

Product

Resources

About