Study of Residual Welding Stresses for Underwater Wet Welding of Low-Alloy Steel Using Magnetic Anisotropic and X-ray Diffractometry Methods

2021 ◽  
Vol 57 (8) ◽  
pp. 692-705
Author(s):  
V. E. Nikulin ◽  
S. G. Parshin ◽  
A. M. Levchenko
Keyword(s):  
Alloy Steel ◽  
Low Alloy Steel ◽  
X Ray ◽  
Underwater Wet Welding ◽  
Residual Welding

The influence of Ni on the microstructure and corrosion resistance of high-strength low alloy steel in the Cl-containing environment

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Dan Wang ◽  
Qingdong Zhong ◽  
Jian Yang ◽  
Shujian Zhang
Keyword(s):  
Corrosion Resistance ◽  
Alloy Steel ◽  
Photoelectron Spectroscopy ◽  
Hsla Steel ◽  
Electrochemical Techniques ◽  
High Strength ◽  
Low Alloy Steel ◽  
Transfer Resistance ◽  
Content Type ◽  
X Ray

Purpose This paper aims to search the optimum content of Ni on the microstructure, phase and electrochemical behavior of high-strength low alloy (HSLA) steel in the 3.5 wt.% NaCl solution. Design/methodology/approach The microstructure and corrosion resistance of Ni-containing HSLA steel in the simulated marine environment was studied by optical microscopy, scanning electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical techniques. Findings The sample containing 3.55 wt.% of nickel exhibited a finer grain size of 10 μm and a lower icorr of 2.169 µA cm−2. The XRD patterns showed that the Fe-Cr-Ni solid solution, FeC and Cr3C2 were observed in samples when Ni was added. Besides, the 3.55 wt.% of nickel addition enhanced the charge transfer resistance of the low alloy steel which suggested the sample possessed excellent inhibition of electrochemical reaction and corrosion resistance. The XPS spectrum suggested that nickel was beneficial to improve the corrosion resistance of steel by forming protective oxides, and the ratio of Fe2+/Fe3+ in protective oxides was increased. Practical implications Finding the comprehensive performance of HSLA steel which can be applied to unmanned surface vehicles in marine operations. Originality/value This study has a guiding significance for optimizing the composition of HSLA steel in a Cl- containing environment.

Laboratory Computer for the High Speed Analysis of High and Low Alloy Steel

1974 ◽  
Vol 28 (5) ◽  
pp. 467-474 ◽  
Author(s):  
Friedrich Strieker ◽  
Paul Friedhoff ◽  
Manfred Heinen ◽  
Jochen Brauner
Keyword(s):  
Alloy Steel ◽  
High Speed ◽  
Fluorescence Analysis ◽  
Low Alloy Steel ◽  
Laboratory Computer ◽  
X Ray ◽  
Routine Work ◽  
High Speed Analysis ◽  
Evaluation Of Data ◽  
Spectral Laboratory

The evaluation of data is presented for routine work in an x-ray fluorescence analysis spectral laboratory. The plotting of calibration and correction curves for x-ray fluorescence analysis of steels with high and low alloy content is described.

Weldability of S460ML High Strength Low Alloy Steel in Underwater Conditions

2016 ◽  
Vol 838 ◽  
pp. 10-17 ◽  
Author(s):  
Dariusz Fydrych ◽  
Jacek Tomków ◽  
Grzegorz Rogalski ◽  
Jerzy Łabanowski
Keyword(s):  
Alloy Steel ◽  
Experimental Evaluation ◽  
High Strength ◽  
Cold Cracking ◽  
Low Alloy Steel ◽  
Maximum Hardness ◽  
High Susceptibility ◽  
Underwater Wet Welding ◽  
Covered Electrodes

The paper presents experimental evaluation of susceptibility of the high strength S460ML steel to cold cracking in the conditions of wet welding with the use of covered electrodes. From the results of Tekken tests it was found out that the investigated steel was characterised, in the conditions of the carried out experiments (underwater wet welding and air welding with rutile electrodes), of high susceptibility to cold cracking. Maximum hardness of HAZ in most cases do not fulfill criterion of PN-EN ISO 15614-1 standard: exceeds 380HV10.

scholarly journals The X-Ray Flurorescence Analysis of Low Alloy Steel with the Fluroprint Spectrometer

1967 ◽  
Vol 53 (7) ◽  
pp. 854-857
Author(s):  
Tomomi MIZUNO ◽  
Hiroshi HARA ◽  
Tetsuo MATSUMURA ◽  
Naomi KOTANI
Keyword(s):  
Alloy Steel ◽  
Low Alloy Steel ◽  
X Ray

Influence of Inclusional State of Manganese Low Alloy Steel on the Quality of Forgings

2015 ◽  
Vol 1114 ◽  
pp. 155-159
Author(s):  
Cristian Predescu ◽  
Sorin Ciuca ◽  
Andrei Berbecaru ◽  
Mirela Sohaciu ◽  
George Coman ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Alloy Steel ◽  
Adjacent Area ◽  
Low Alloy Steel ◽  
Microscope Examination ◽  
X Ray ◽  
Macroscopic Examination ◽  
Scanning Electron

The paper presents results of researches carried out to establish the causes that led to the cracking of forgings made of manganese low alloy steel microalloyed with boron. The researches includes analysis of samples taken from the forgings in the cracked surface area and also analysis of a sample from forged material. The following methods and techniques were used for investigation:metallographic analysis by optical microscopy;visual macroscopic examination by scanning electron microscopy (SEM) at low magnification, using scanning electron microscope;examination by scanning electron microscopy on the material cracks area and its adjacent area;investigation of material by X-ray microanalysis in energy dispersive (EDAX) for its characterization, in terms of microcomposition;

Corrosion mechanism of a new-type low-alloy corrosion resistant steel containing Sb used in acid environment

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ying Yang ◽  
Wei Wu ◽  
Xuequn Cheng ◽  
Jinbin Zhao ◽  
Baijie Zhaoal ◽  
...  
Keyword(s):  
Alloy Steel ◽  
Corrosion Mechanism ◽  
Corrosion Resistant Steel ◽  
Resistant Steel ◽  
Low Alloy Steel ◽  
Corrosion Resistant ◽  
Content Type ◽  
X Ray ◽  
Acid Environment ◽  
New Type

Purpose This study aims to develops a new-type low-alloy corrosion resistant steel containing Sb and investigate the corrosion mechanism of this new-type low-alloy steel. Design/methodology/approach Energy dispersive spectrometer, X-ray photoelectron spectroscopy, X-Ray diffraction and scanning electron microscopy were used to evaluate the corrosion resistance of the rust layers formed on these samples. Laser confocal microscopy was used to observe the corroded surfaces of the steels. Findings Results showed that Sb added can consume H+ in the solution, thereby preventing the oxygen reaction to slow down the corrosion rate. Meanwhile, a stable and insoluble substance (Sb2O3) in the acidic solution would be produced when the reaction of the product of Sb and H+ with the enough dissolved oxygen in the solution. Due to the precipitation of Sb2O3 and iron oxyhydroxides, the rust layer of Sb-containing steel became more uniform and compact, which resulted in better corrosion resistance in acid environment. Originality/value In this study, a new-type acid resistant low-alloy steel containing Sb was developed. Compared with the results, the corrosion mechanism of the new-type low-alloy steel in acid environment was discussed.

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