Characterization of laser treated surfaces by X-ray diffraction

• Grant number: 07/08265-2
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2009
• End date: December 31, 2011
• Field of knowledge: Engineering - Aerospace Engineering - Materials and Processes for Aeronautical, Aerospace Engineering
• Principal Investigator: Milton Sergio Fernandes de Lima
• Grantee: Milton Sergio Fernandes de Lima
• Host Institution: Instituto de Estudos Avançados (IEAv). Departamento de Ciência e Tecnologia Aeroespacial (DCTA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil

Abstract

Lasers have attracted much attention for the materials processing, including in surface engineering. Among the various laser surface processing of materials techniques, this work will study five types: Laser controlled fracture is a micromachining method used to guide a crack through a desired path in order to create a controlled fracture. Microtexturing is a technique for changing the chemical properties and the roughness of the materials surface using pulsed lasers. Microstructuring consists on producing microscopic dimples at the materials surface aiming create tiny liquid reservoirs. Laser carburization is a process for create carbides (hard phase in steels) at the materials surface by reacting carbon and steel under the laser. Laser hardening is the process of generating martensite at the surface of ferrous alloys. All these process have been chosen in order to create a knowledge database for the development of aerospace materials. X-ray diffraction will be employed in all processes in order to give information on phase transformations, residual stress fields and average grain size. (AU)

Scientific publications

(4)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BAMBIRRA DE OLIVEIRA, RAPHAEL JOSE; MOTA DE SIQUEIRA, RAFAEL HUMBERTO; FERNANDES DE LIMA, MILTON SERGIO. Microstructure and wear behaviour of laser hardened SAE 4130 steels. International Journal of Surface Science and Engineering, v. 12, n. 2, p. 161-170, 2018. (07/08265-2)

DE CARVALHO, SHEILA MEDEIROS; FERNANDES DE LIMA, MILTON SERGIO. Laser beam welding tempered 300M ultrahigh mechanical strength steel. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 34, n. 1, p. 18-23, JAN-MAR 2012. (07/08265-2)

CARVALHO LUCAS, FERNANDA LIDIA; GUIDO, VANESSA; KAFER, KARINE ANDREA; BERNARDI, HEIDE HELOISE; OTUBO, JORGE. ECAE Processed NiTi Shape Memory Alloy. MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS, v. 17, n. 1, p. 186-190, AUG 2014. (10/20565-4, 07/08265-2)

FERNANDES DE LIMA, MILTON SERGIO; LADARIO, FABRICIO PRIETO; NEVES, DAVI; DINIZ, ANSELMO EDUARDO. Machining performance of laser surface micro-textured drilling tools. International Journal of Surface Science and Engineering, v. 5, n. 2-3, p. 98-115, 2011. (07/08265-2)