The effect of the heat input energy on the tensile properties of the AH-40 fatigue crack arrester steel, welded by the use of the robotic metal-cored arc welding technique

Kazasidis, Marios; Pantelis, Dimitrios

doi:10.1007/s00170-017-0761-8

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…Higher δ-ferrite formation associated with higher concentration of Mo contributes to a greater tendency towards precipitation of deleterious phases such as sigma (σ) and chi (χ) [3] Although some previous works [3,4,11] have predicted microstructural and property changes on AISI 317L, very few articles were published considering the influence of the robotic-pulsed GMAW process on the microstructure and mechanical properties of this steel. It is worthwhile mentioning that the robotic-pulsed GMAW process allows a much better control of the welding parameters, arc stability, and heat input as well as a high productivity rate and low operation cost in comparison with the semi-automatic process [12].…”

Section: Introductionmentioning

confidence: 99%

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Influence of the heat input and aging treatment on microstructure and mechanical properties of AISI 317 L steel weldments using 0020 robotic–pulsed GMAW

Antunes

Silva

Corrêa

et al. 2019

Int J Adv Manuf Technol

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In this work, the effect of heat input and aging treatment on the microstructural characteristics and mechanical properties of similar AISI 317L austenitic stainless steel weldments used in the petroleum industry was investigated. The filler metal used was the AWS ER317L electrode at two different heat input levels (4 and 8 kJ/cm) in order to verify the influence of this parameter on the precipitation of deleterious phases. The specimens were aged at 700 °C for 50 and 100 h. Quantification and microchemical mapping of precipitated phases after welding and aging thermal treatment (ATT) were performed. Vickers hardness and tensile tests were used to evaluate the mechanical properties. It was observed that aging promoted a refinement of the base metal region, and all delta ferrite was transformed into sigma phase. The delta ferrite present in the fusion zone was completely transformed into sigma and chi phases. In the aged specimens for 100 h a lower occurrence of the secondary austenite phase (γ2) was identified, which indicates that with the increase of ATT time the dissolution of γ2 occurred in the already precipitated sigma phase. All welding conditions showed an increase in tensile strength, yield limit and hardness with the ATT.

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Section: Introductionmentioning

confidence: 99%

“…Such information is decisive for guiding the correct choice of welding parameters (heat input, travel speed, etc.) to be applied in order to increase the quality of weldment and, consequently, the performance of materials used in process equipment manufacturing [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Influence of the heat input and aging treatment on microstructure and mechanical properties of AISI 317 L steel weldments using 0020 robotic–pulsed GMAW

Antunes

Silva

Corrêa

et al. 2019

Int J Adv Manuf Technol

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“…This is may be related to the increase in the precipitation of the 𝜎 phase with the increase of the AHT time. In several cases, the greater precipitation of this phase affects the welded joint's tensile strength and hardnesst due to the dispersion of hard 𝜎 phase particles into the ferrite and/or austenite grains 40,42,43 . However, it is worthwhile mentioning that the tensile properties results indicate that even though the precipitation of 𝜎 phase increases with the AHT time, its volume fraction is not enough to produce a significant loss of ductility.…”

Section: Tensile Testsmentioning

confidence: 99%

Effect of the Heat Input and Ageing Treatment on Microstructure and Mechanical Properties of AISI 317L Stainless Steel Dissimilar Welded Joints

2022

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The present work investigated the influence of heat input and aging time on the microstructural characteristics and the mechanical properties of dissimilar AISI 317L austenitic stainless steel welded joints. The AWS ER2209 wire-electrode was used as filler metal, and two different heat input levels were applied (4 and 8 kJ/cm), aiming to verify the influence of this parameter on the deleterious phases precipitation. An aging heat treatment (AHT) was carried out at 700 °C for two different exposure times: 50 and 100 hours. It was observed that aging promoted a refinement of the base metal region, and all delta ferrite was transformed into the sigma phase. The microstructure of the fusion zone (without AHT) presented a significant amount of austenite that precipitated in three different morphologies: allotriomorphific of grain boundary, Widmanstätten, and intragranular. For all the thermally treated samples, it was possible to identify the presence of the σ and χ phases. Additionally, the highest concentration of the χ phase was identified in the samples submitted to 50 hours of AHT. The welding condition and AHT that presented joints with higher mechanical resistance and remarkable toughness were those welded with 4 kJ/cm heat input and with 100 hours of AHT. All welded joints showed an increase in the hardness profile after AHT. The microhardness values showed a good correlation with the microstructure and the mechanical tests so that the highest values of microhardness were observed in welded joints with heat input of 4 kJ/cm and 100 hours of AHT

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Comparative study of toughness between the AH 40 fatigue crack arrester steel and its weld metal in the case of robotic metal-cored arc welding

Kazasidis

Pantelis

Chatzidouros

et al. 2018

Int J Adv Manuf Technol

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The effect of the heat input energy on the tensile properties of the AH-40 fatigue crack arrester steel, welded by the use of the robotic metal-cored arc welding technique

Cited by 5 publications

References 24 publications

Influence of the heat input and aging treatment on microstructure and mechanical properties of AISI 317 L steel weldments using 0020 robotic–pulsed GMAW

Influence of the heat input and aging treatment on microstructure and mechanical properties of AISI 317 L steel weldments using 0020 robotic–pulsed GMAW

Effect of the Heat Input and Ageing Treatment on Microstructure and Mechanical Properties of AISI 317L Stainless Steel Dissimilar Welded Joints

Comparative study of toughness between the AH 40 fatigue crack arrester steel and its weld metal in the case of robotic metal-cored arc welding

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