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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of laser welding on microstructure and mechanical behaviour of dual phase 600 steel sheets

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Author(s):
Mansur, Vinicius Machado [1] ; de Figueiredo Mansur, Raquel Alvim [1] ; de Carvalho, Sheila Medeiros [2] ; Mota de Siqueira, Rafael Humberto [1] ; Fernandes de Lima, Milton Sergio [1]
Total Authors: 5
Affiliation:
[1] Inst Adv Studies, Photon Divison, BR-12228001 Sao Jose Dos Campos, SP - Brazil
[2] Univ Fed Espirito Santo, Dept Mech Engn, BR-29075910 Vitoria, ES - Brazil
Total Affiliations: 2
Document type: Journal article
Source: HELIYON; v. 7, n. 12 DEC 2021.
Web of Science Citations: 0
Abstract

Dual Phase steels are one of the most used advanced high-strength materials in the industry, due to its combination of a ductile ferritic matrix and disperse hard martensite islands, which provide outstanding mechanical properties for components to be cold stamped. This work investigated fiber laser welding applicability in Dual Phase 600 1.6 mm thick steel sheets, evaluating potential welding impacts on properties of the material for industrial applications. A first set of bead-on-plate welds was generated to define best parameters for subsequent tests. A second set was prepared, consisting of butt joints welded in the optimized condition. Weld microstructure was characterized as 100% martensitic at fusion zone (FZ), with growing fractions of ferrite at Heat Affected Zone (HAZ) as one moves away from fusion line. Hardness is around 60% higher at FZ than at BM, being maximum at supercritical HAZ due to its highly refined microstructure and HAZ softening was not observed. Tensile and Erichsen cupping tests presented similar strength results between welded and non-welded specimens, with slight ductility reduction. Finally, numeric simulations based on Finite Element Analysis were carried out to estimate temperature evolution, phase proportions, residual stresses and distortion levels, achieving excellent agreement with experimental results. (AU)

FAPESP's process: 19/25229-7 - The fabrication of small satellites with use of lasers
Grantee:Rafael Humberto Mota de Siqueira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 16/11309-0 - The study, development and application of a hybrid process: Additive Manufacturing (AM) plus High Speed Machining/Grinding (HSM/G)
Grantee:Reginaldo Teixeira Coelho
Support Opportunities: Research Projects - Thematic Grants