| Texto completo | |
| Autor(es): |
de Andrade Ferreira, Caroline Cristine
[1]
;
Braga, Vagner
[1]
;
Mota de Siqueira, Rafael Humberto
[1]
;
de Carvalho, Sheila Medeiros
[1]
;
Fernandes de Lima, Milton Sergio
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Inst Adv Studies, Photon Div, Trevo Amarante 1, BR-12228001 Sao Jose Dos Campos, SP - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | OPTICS AND LASER TECHNOLOGY; v. 124, APR 2020. |
| Citações Web of Science: | 0 |
| Resumo | |
Dual phase steels have been used in safety components for the automotive industry and represents a standard in terms of energy absorbing steel alloys. After welding, these components present a martensitic transformation in the fusion and heat-affected zones with an intrinsic brittleness. The current contribution presents a procedure where the DP980 steel sheet is kept at a given temperature during and after the laser weld in order to generate bainite instead of martensite. The results using an isothermal treatment at 527 degrees C shown a microstructure composed by grain boundary and bainitic ferrite and retained austenite with a constant hardness in the base material and heat-affected and fusion zones of 280 HV. The room temperature welds present hardness values between 320 and 500 HV. The high-temperature welds also shown a decrease in the maximum residual stress at the weld centerline by 1/3, with a consequential reduction in the warp of the joined component. (AU) | |
| Processo FAPESP: | 16/11309-0 - Estudo, desenvolvimento e aplicação de processo híbrido: Manufatura Aditiva (Ma) + High Speed Machining/Grinding (HSM/G) |
| Beneficiário: | Reginaldo Teixeira Coelho |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 16/16683-8 - Desenvolvimento experimental da soldagem a laser em altas temperaturas para aços de ultra-alta resistência mecânica para aplicações espaciais |
| Beneficiário: | Milton Sergio Fernandes de Lima |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |