Study of Mechanical Strength of Laser Beam Welding with Thermochemical Plasma Treatment for the Ti-6Al-4V alloy.

• Grant number: 12/12685-5
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: November 01, 2012
• End date: July 31, 2015
• Field of knowledge: Engineering - Aerospace Engineering
• Principal Investigator: Milton Sergio Fernandes de Lima
• Grantee: Hélio Rubens Santos Simoni
• 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

The present study intends to produce better laser welded Ti-Al-V parts by plasma nitriding heat treatment. Usually the welds present lower mechanical properties than the base material. A post-welding heat treatment allows reestablishing the tensile stress and ductility to the welded part. In the current study, the heat treatment will be realized together with the plasma nitriding in order to obtain the desired mechanical behavior. Using the same heat treatment one can produce a convenient microstructure and produce a nitrided surface with enhanced tribological properties.