Banca de QUALIFICAÇÃO: ANDERSON JOEL VELHO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ANDERSON JOEL VELHO
DATE: 20/12/2023
TIME: 19:00
LOCAL: Campus Farroupilha
TITLE:

Influence of intermediate heat treatment on hydroformed metals as an inhibitor of mechanical defects

KEY WORDS:

Hydroforming, yield point, rupture limit, mechanical defects, aluminum,optical microscopy, annealing.

PAGES: 37
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUMMARY:

The hydroforming technique, also known as hydroforming, plays an essential role in the industry by simplifying the manufacturing of complex parts, reducing costs, and minimizing material waste. In addition to enhancing mechanical strength and reducing weight, this technique benefits the automotive and aerospace sectors, improving project efficiency. It stands out for streamlining processes, contributing to sustainability through the conscious use of resources. The objective of this work is to analyze the influence of intermediate heat treatment on metals subjected to hydroforming. The study is divided into two articles to assess the impacts on defects that arise during the process. The primary goal of the first article is to create a graphical representation illustrating the behavior of metal sheets of the Al-3030F alloy during the hydroforming process. In this context, a hydroforming diagram is constructed, using system pressure on the x-axis and working force on the y-axis. The article also describes a systematic analysis and analytical development of the process. The generated diagram will serve as a foundation for designing parts and products, allowing for the anticipation of the behavior of these elements based on the graph. This will enable strategic decision-making, such as material or thickness replacement, aiming to optimize hydroformed metal sheet projects and avoid over-dimensioning. Regarding the research, the AL3003F alloy with a thickness of 0.4 mm was chosen due to its widespread application in the automotive and electronic sectors, as well as its ease of accessibility. Hydroforming was carried out using the free die, following literature recommendations due to reduced costs, resulting in the formation of a hemisphere. The pressurized fluid used was water, without chemical treatment. Samples were subjected to the process using a developed device with a capacity of 60 kgf/cm², at pressure intervals of 5 kgf/cm², 10 kgf/cm², 15 kgf/cm², and 20 kgf/cm² until rupture. After characterization and identification of parameters and defects through Optical Microscopy, a specific hydroforming diagram for the alloy in the process was obtained. Subsequently, the use of annealing heat treatment was explored as a means to prevent mechanical defects resulting from hydroforming. The methodological approach involves intermittent application of heat treatment in pressure intervals between 15 kgf/cm² and 19 kgf/cm², considered critical and prone to manifest the main mechanical defects based on the development of the diagram in article 1. After the process execution, the impacts of annealing heat treatment will be identified through Optical Microscopy techniques, allowing for a comparison between the hydroforming process with and without annealing.

COMMITTEE MEMBERS:
Interno - 1804846 - JULIANO CANTARELLI TONIOLO
Externa ao Programa - 1768385 - LISIANE TREVISAN