Effect of Cr/Ni equivalent ratio on ductility-dip cracking in AISI 316L weld metals

Jang, A. Y.; Lee, D.J.; Lee, S.H.; Shim, Jong Hun; Kang, Shaoguang; Lee, H.W.

doi:10.1016/j.matdes.2010.06.016

Cited by 23 publications

(15 citation statements)

References 7 publications

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“…After austenitization the steel consisted of lath martensite and vermicular δ-ferrite [30,31] (Figure 2a). The δ-ferrite was distributed uniformly over the entire microstructure with varying spacing of approx.…”

Section: Light Optical Microscopymentioning

confidence: 99%

Kinetics modeling of delta-ferrite formation and retainment during casting of supermartensitic stainless steel

2017

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Section: Light Optical Microscopymentioning

confidence: 99%

Kinetics modeling of delta-ferrite formation and retainment during casting of supermartensitic stainless steel

2017

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“…The consequence of segregation at the boundaries of the dendrites is the mechanical instability of the steel during hot forming [17][18][19]. During the continuous casting of this steel at the casted slab/beam locations, where the cooling rate during casting is high enough, part of the metastable δ-ferrite is maintained at room temperature due to the imperfect transformation of the δ in γ [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…The aim of the study was to determine the effectiveness of the transformation, i.e., the decomposition of the δ-ferrite crystal grains upon annealing at 1050 • C, 1150 • C and 1250 • C with respect to the amount and the shape of the δ-ferrite in SS2343 stainless steel. Studies on solid-state phase transformations related to the heat treatment of various grades of stainless steels are especially important for understanding welding processes, in order to improve welding quality in terms of mechanical, metallurgical and corrosion properties [9,10,[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Transformation of the δ-Ferrite in SS2343 Austenitic Stainless Steel upon Annealing at 1050 °C, 1150 °C and 1250 °C

Arh

Tehovnik

Vode

2021

Metals

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The solidification behaviors of laboratory cast austenitic SS2343 stainless steel in terms of the volume fraction of δ-ferrite in the as-cast state and its transformation after subsequent annealing were investigated. Monitoring of morphological transformations of δ-ferrite in the microstructure show the progress of δ-ferrite dissolution. Annealing tests were conducted at 1050 °C, 1150 °C and 1250 °C with soaking times of 5 and 40 min. The thermodynamic prediction and metallographic identification of δ-ferrite are presented. The ferrite fractions were measured using a magnetic method and determined to be in the range between 10.7% and 14.6%. The volume share of δ-ferrite decreased with an increase in temperature and the time of annealing. About 50–55% the δ-ferrite was effectively transformed. The δ-ferrite phase, originally present in a dendritic morphology, tends to break up and spheroidize. The morphology varies from vermicular, lacy and acicular shapes to globular for higher temperatures and for longer exposure times. In the δ-ferrite after annealing, concentrations of Cr and Mo decrease, and conversely the concentration of Ni increase, all by small, but significant, amounts. The observed changes in the solute concentration can be explained in terms of the transformation of ferrite into austenite and sigma phases.

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“…Their toughness properties are significantly good, and no martensite transformation is observed during cooling. Therefore, cold cracking problems are not observed in joining austenitic stainless steels as in ferritic martensitic stainless steels, and no pre-heating during joining and post-welding heat treatment are required [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Characterization of microstructure, chemical composition, and toughness of a multipass welded joint of austenitic stainless steel AISI316L

Tümer

Yilmaz

2016

Int J Adv Manuf Technol

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In this study, AISI 316 types of austenitic stainless steels were welded by FCAW (flux-cored arc welding) using E316LT1-1/4 flux-cored wire under various shielding gas mixtures containing CO 2 at different ratios. Effects of mixed ratio of Ar and CO 2 in the in the shielding gas on the microstructure, impact toughness, and microhardness of welded materials were studied. Stereo optical microscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscope (TEM), and TEM/ mapping analysis techniques were used for microstructural characterizations. The impact toughness values of the weldments were decreased as a result of the formation and growth of inclusions in the microstructure due to the increases amount of CO 2 in the shielding gas. The hardness values and δ-ferrite amount in the weld metal were affected by depending on of the shielding gas mixtures.

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Effect of Cr/Ni equivalent ratio on ductility-dip cracking in AISI 316L weld metals

Cited by 23 publications

References 7 publications

Kinetics modeling of delta-ferrite formation and retainment during casting of supermartensitic stainless steel

Kinetics modeling of delta-ferrite formation and retainment during casting of supermartensitic stainless steel

Transformation of the δ-Ferrite in SS2343 Austenitic Stainless Steel upon Annealing at 1050 °C, 1150 °C and 1250 °C

Characterization of microstructure, chemical composition, and toughness of a multipass welded joint of austenitic stainless steel AISI316L

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