| Texto completo | |
| Autor(es): |
Raquel Alvim de Figueiredo Mansur
[1]
;
Caroline Cristine de Andrade Ferreira
[2]
;
Isabela Atílio
[3]
;
Sheila Medeiros de Carvalho
[4]
;
Vagner Braga
[5]
;
Rafael Humberto de Mota Siqueira
[6]
;
Milton Sergio Fernandes de Lima
[7]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Institute for Advanced Studies. Photonics Division - Brasil
[2] Institute for Advanced Studies. Photonics Division - Brasil
[3] Institute for Advanced Studies. Photonics Division - Brasil
[4] Institute for Advanced Studies. Photonics Division - Brasil
[5] Institute for Advanced Studies. Photonics Division - Brasil
[6] Institute for Advanced Studies. Photonics Division - Brasil
[7] Institute for Advanced Studies. Photonics Division - Brasil
Número total de Afiliações: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS; v. 23, n. 4 2020-07-20. |
| Resumo | |
Abstract It was verified that SAE 4130 steel plates crack when laser beam welded at room temperature (RT). To overcome this problem, this work proposes a high temperature (HT) laser welding in order to reduce the residual stresses and create a bainitic structure instead of a martensitic one. A conventional post-welding heat treatment (PWHT) had been used as a comparison for HT. The centerline crack disappeared after a heat treatment of both in-situ (HT) or after inserting in a furnace (PWHT) at 500 °C for 10 minutes. The finite element analyses indicated a residual stress reduction from 163.70 to 3.72 MPa in the fusion zone (FZ) of the welds from RT to HT. The hardness obtained in FZ depends on the thermal cycle induced microstructure of the welds as 400 HV, 340 HV and 250 HV, for martensite (RT), tempered martensite (PWHT) and bainite (HT) micro-constituents. The proposed in-situ high-temperature laser beam welding method proved its usefulness to solve the center crack issue in SAE 4130 joints. (AU) | |
| Processo FAPESP: | 18/23884-5 - Avaliação do processo de manufatura aditiva no comportamento microestrutural e mecânico em reparos para moldes de injeção |
| Beneficiário: | Vágner Braga |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| 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: | 19/25229-7 - Fabricação de estruturas de satélites de pequeno porte com uso de lasers |
| Beneficiário: | Rafael Humberto Mota de Siqueira |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |