Experimental Study of the Temperature Distribution in Welded Thin Plates of Duplex Stainless Steel for Automotive Exhaust Systems

Betini, Evandro Giuseppe; Cione, Francisco C.; Mucsi, Cristiano Stefano; Colosio, Marco Antonio; Rossi, Jesualdo Luiz; Orlando, M. T. D.

doi:10.4271/2016-01-0503

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…In the process of regular welding, the cooling rate is accelerated; thus, the ferrite-austenite alteration cannot be completed, and some δ-ferrite is kept at room temperature after solidification. High input heat leads to a low cooling rate, which further contributes to the change from delta-ferrite phase to austenite phase in weld metal with stainless steel [39][40][41]. Consequently, the duplex δ + γ structure will be the definitive composition of the weld metal of ASS [42][43][44][45].…”

Section: Duplex Structurementioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

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Abstract:The effects of input heat of different welding processes on the microstructure, corrosion, and mechanical characteristics of welded duplex stainless steel (DSS) are reviewed. Austenitic stainless steel (ASS) is welded using low-heat inputs. However, owing to differences in the physical metallurgy between ASS and DSS, low-heat inputs should be avoided for DSS. This review highlights the differences in solidification mode and transformation characteristics between ASS and DSS with regard to the heat input in welding processes. Specifically, many studies about the effects of heat energy input in welding process on the pitting corrosion, intergranular stress, stress-corrosion cracking, and mechanical properties of weldments of DSS are reviewed.

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Section: Duplex Structurementioning

confidence: 99%

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Mohammed

Ishak

Aqida

et al. 2017

Metals

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“…Finally, the final microstructure depends on the parameters of welding cycles such as holding time, peak temperature, and cooling rate [6,7,8]. So, the aim of this experimental work is to optimized welding parameters in order to ensure the soundness better quality of the fabricated parts [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of the cooling rates on heat-affected zone of UNS S32304 duplex stainless steel welded by pulsed GTAW process

Betini¹,

Gomes²,

Reis³

et al. 2017

Blucher Physics Proceedings

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Two thin plates of UNS 32304 of duplex stainless steel were joined by pulsed gas tungsten arc welding (GTAW) using a mixture 98% of argon plus 2% of nitrogen as shielding gas or pure argon as purging gas at the bottom of the plate without filler metal. The temperature profile close and away from the weld pool was measured using K type (Ni-Cr) thermocouples, connected to a digital data acquisition system. The thermal cycles was recorded in the heat-affected zone (HAZ) at a distance in between 1 and 3 mm from the joint line. The cooling rate and holding time were studied with respect to the used purging gas. Experimental thermal profiles are in good agreement with literature values. The joints welded without any purging gas revealed high peak temperature and cooling rates. The present investigation showed that temperature peaks are comprised in the phase transformation temperature ranges for the welded duplex stainless steel.

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Preservation of Natural Phase Balance in Multi-pass and Wire Arc Additive Manufacturing-Made Duplex Stainless Steel Structures

Binesh

Bahrami²,

Hebel

et al. 2021

J. of Materi Eng and Perform

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Experimental Study of the Temperature Distribution in Welded Thin Plates of Duplex Stainless Steel for Automotive Exhaust Systems

Cited by 4 publications

References 11 publications

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

Effect of the cooling rates on heat-affected zone of UNS S32304 duplex stainless steel welded by pulsed GTAW process

Preservation of Natural Phase Balance in Multi-pass and Wire Arc Additive Manufacturing-Made Duplex Stainless Steel Structures

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