Microstructure of intercritical heat affected zone and toughness of microalloyed steel laser welds

Derevyagina, L. S.; Гордиенко, А. И.; Orishich, A. M.; Маликов, А. Г.; Surikova, N. S.; Волочаев, М. Н.

doi:10.1016/j.msea.2019.138522

Cited by 23 publications

(8 citation statements)

References 26 publications

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“…Moreover, it is well known that the concentrated heat input and associated confined heat affected zone (HAZ) are the representative advantages of laser welding [ 32 ], which is obvious in CoCrFeNi/304ss and CoCrNi/304ss welded joints ( Figure 6 a,b). It can also be found that the hardness of confined HAZ was reduced as compared to the adjacent base material, due to the existence of partial-recrystallized grain suffered during the welding thermal cycle.…”

Section: Resultsmentioning

confidence: 99%

High-Strength Ductility Joining of Multicomponent Alloy to 304 Stainless Steel Using Laser Welding Technique

et al. 2023

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In this work, a series of multicomponent alloys (CoCrFeNi, CoCrNi, and CoNiV) were laser welded with 304 stainless steel (304ss), and detailed comparisons on microstructural characteristics and mechanical properties were conducted for dissimilar laser welded joints. It is revealed that all of the dissimilar laser welded samples possessed defect-free joints and the corresponding fusion zone consisting of fcc single-phase showed homogeneous element distribution accompanied by a narrow element gradient in the vicinity of the fusion zone boundary. After laser welding with identical welding parameters, equiaxed grain was observed on the side of multicomponent alloy, while coarse columnar grain was obtained on the side of 304ss. Especially, the columnar grains of the fusion zone on the side of 304ss disclosed preferential <001> growth direction in the CoCrFeNi/304ss and CoCrNi/304ss welded joints. Furthermore, all of the dissimilar laser welded joints were fractured in the fusion zone, attributing to the drastic loss of strength in the fusion zone with coarsened grain. It is worth noting that a special lamellar structure that merged by dimples was found in the fracture surface of the CoNiV/304ss joint, closely related to the existence of the V-enriched region. Finally, a high strength–ductile synergy can be achieved by laser welding CoNiV alloy to 304ss, which showed a yield strength of 338 MPa, ultimate tensile strength of 686 MPa, and total elongation of 28.9%. These excellent mechanical properties prevailed in the potential of a CoNiV/304ss laser welded joint to be applied as a structural material.

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Section: Resultsmentioning

confidence: 99%

High-Strength Ductility Joining of Multicomponent Alloy to 304 Stainless Steel Using Laser Welding Technique

et al. 2023

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“…ОСОБЕННОСТИ ФОРМИРОВАНИЯ МИКРОСТРУКТУР В ЗОНАХ ТЕРМИЧЕСКОГО ВЛИЯНИЯ ЛАЗЕРНЫХ СВАРНЫХ ШВОВ НИЗКОУГЛЕРОДИСТОЙ СТАЛИ С РАЗНЫМ ИСХОДНЫМ СТРУКТУРНЫМ СОСТОЯНИЕМ 1 Гордиенко А.И., 2 Оришич А.М., 2 Маликов А.Г., 3 Волочаев М.Н., 4 Панюхина А.Д. 1 Институт физики прочности и материаловедения СО РАН, Томск 2 Институт теоретической и прикладной механики им.…”

Section: Doi: 1017223/978-5-907442-03-0-2021-008unclassified

“…При этом прочность лазерного сварного соединения низкоуглеродистой стали остается на уровне прочности основного материала [2]. Однако за счет высоких скоростей охлаждения при лазерной сварке формируются дисперсные структуры реечной морфологии, характеризующиеся повышенным уровнем микротвердости [1] и низким уровнем ударной вязкости разрушения [3]. Комплексное микролегирование и уровень углерода в стали оказывают влияние на особенности структурообразования в сварном шве, тип структур и их объемную долю [4][5].…”

Section: Doi: 1017223/978-5-907442-03-0-2021-008unclassified

Особенности Формирования Микроструктур В Зонах Термического Влияния Лазерных Сварных Швов Низкоуглеродистой Стали С Разным Исходным Структурным Состоянием

2021

Международная Конференция "Физическая Мезомеханика. Материалы С Многоуровневой Иерархически Организованной Структурой И Интелле

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“…Submerged arc welding is one of the main technological operations in the manufacture process of pipes. However, this method has a significant drawback because of large heat input extends heat affected zone (HAZ) and decreases mechanical properties 5) .…”

Section: Heat Affected Zone (Haz)mentioning

confidence: 99%

“…Consequently, as mentioned before, there is an inverse relationship between HAZ expanding and impact toughness where I (DC) has a critical role in this arena. The model of impact toughness is expressed by equation (5). This relation is obtained after the elimination of insignificant terms from the analyses.…”

Section: Data Analyzingmentioning

confidence: 99%

Numerical Model for Powder Consumption, HAZ Width and Toughness in Tandem Submerged Arc Welding

Kakaei-Lafdani

Valehi

2020

Journal of Welding and Joining

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The two wire tandem submerged arc welding (TSAW) process has attracted widespread attention as an automated welding method in various industries. It provides several advantages including good welding quality and high deposition rate. However, the complexity of arc behavior leads to difficulties in adjusting the main affecting parameters such as amperage, voltage and the nozzles assembly. In the present investigation, a response surface methodology (RSM) and Taguchi's orthogonal array technique were carried out to determine the influence of the amperage and the voltage of DC and AC currents as well as the assembly of nozzles on the width and toughness of HAZ as well as the consumption of welding powder. The results confirmed the effectiveness of the developed models for predicting experimental evidence with high precision. The input parameters including amperage, voltage and the assembly of nozzles were subsequently adjusted to minimize the HAZ width and powder consumption as well as to maximize HAZ toughness.

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Microstructure of intercritical heat affected zone and toughness of microalloyed steel laser welds

Cited by 23 publications

References 26 publications

High-Strength Ductility Joining of Multicomponent Alloy to 304 Stainless Steel Using Laser Welding Technique

High-Strength Ductility Joining of Multicomponent Alloy to 304 Stainless Steel Using Laser Welding Technique

Особенности Формирования Микроструктур В Зонах Термического Влияния Лазерных Сварных Швов Низкоуглеродистой Стали С Разным Исходным Структурным Состоянием

Numerical Model for Powder Consumption, HAZ Width and Toughness in Tandem Submerged Arc Welding

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