Banca de QUALIFICAÇÃO: HENDERSON SOARES MADUREIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : HENDERSON SOARES MADUREIRA
DATE: 06/07/2021
TIME: 09:00
LOCAL: Remota (video conferência)
TITLE:

Structure and mechanical behaviour study of TRIP 780 steel welds made by friction stir spot welding (FSSW).

KEY WORDS:

Friction welding. Transformation induced by plasticity. Microstructure. Mechanical properties. 

PAGES: 56
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Metalurgia de Transformação
SPECIALTY: Soldagem
SUMMARY:

The relentless pursuit of energy efficiency has not only fostered advances in the field of
industrial processes, but also the development of new materials. In the automotive segment,
among the developed steels, the AHSS (Advanced High Straight Steel) stand out, which
include steels that undergo phase transformation induced by plastic deformation, called TRIP
(Transformation Induced Plasticity) where it is possible to obtain high mechanical strength
and ductility. The processing of this grade of steel, especially its welding, presents numerous
challenges that require further study and understanding. In this context, one of the most
promising alternatives involves the use of the friction spot welding process where there is
conversion of kinetic energy into heat through friction between a non-consumable tool in
rotary motion and the materials to be joined. As the solidus temperature of the materials is not
reached, this union process develops in the solid state. Thus, this work will aim to study welds
on TRIP 780 steel sheets after induced transformation produced by the FSSW (Friction Stir
Spot Welding) process. It will be investigated how the rotation speed and mixing time
influence their microstructure and mechanical behavior. Therefore, it is proposed to carry out
an experimental planning that allows the interaction of the factors studied at all levels,
followed by the preparation of specimens for microstructural characterization, mechanical
tensile tests and microhardness tests.

BANKING MEMBERS:
Presidente - CLAUDIO TURANI VAZ
Interna - ELAINE CARBALLO SIQUEIRA CORREA
Interno - CARLOS ALBERTO CARVALHO CASTRO
Externo ao Programa - WANDERLEY XAVIER PEREIRA