| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Viana, Filomena
Universidade do Porto
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Wear Rate, Tribo-Corrosion, and Plastic Deformation Values of Co-Cr-Mo Alloy in Ringer Lactate Solutioncitations
- 2023Scratch and Wear Behaviour of Co-Cr-Mo Alloy in Ringer’s Lactate Solutioncitations
- 2021Seedless Cu electroplating on Co-W thin films in low pH electrolyte: early stages of formationcitations
- 2021Preliminary tribocorrosion evaluation of bio-functionalized Ti doped with Ca-P-Srcitations
- 2012CNT-aluminum metal matrix nanocomposites
- 2010Brazing Ti-47Al-2Cr-2Nb to Inconel 718 with different filler alloys: microstructural characterization of the interfaces
- 2006Assessing the influence of heat treatments on γ-TiAl joints
- 2006Assessing the influence of heat treatments on y-TiAl joints
- 2003Joining Ti-47Al-2Cr-2Nb with a Ti/(Cu,Ni)/Ti clad-laminated braze alloycitations
- 2003The influence of the processing temperature on the microstructure of gamma-TiAl joints brazed with a Ti-15Cu-15Ni alloycitations
- 2001Multilayered interface in Ti/Macor (R) machinable glass-ceramic jointscitations
- 2000Zr bearing gama-TiAl induction meltedcitations
- 2000Zr bearing gamma-TiAl induction melted
Places of action
| Organizations | Location | People |
|---|
article
Assessing the influence of heat treatments on y-TiAl joints
Abstract
The heat treatment of gamma-TiAl alloy (Ti-47Al-2Cr-2Nb (at.%)) diffusion brazed joints was investigated. Joining was performed using a Ti/Ni/Ti clad-laminated braze alloy foil at 1050 and 1150 degrees C with a dwell time of 10 minutes. The joints were subsequently heat treated at 1250 and 1350 degrees C for 240 and 30 minutes, respectively. The microstructure and the chemical composition of the interfaces were analysed by scanning electron microscopy (SEM) and by energy dispersive X-ray spectroscopy (EDS), respectively. Microhardness tests performed across the interface were used to roughly predict the mechanical behaviour of the as-diffusion brazed and of the heat treated joints. Diffusion brazing produced interfaces with two distinct layers essentially composed of alpha(2)-Ti3Al and of TiNiAl; gamma-TiAl was also detected for joining at 1150 degrees C. After heat treating, the as-diffusion brazed microstructure of the interface was completely replaced by a mixture essentially composed of gamma-TiAl and alpha(2)-Ti3Al single phase grains and of (alpha(2) + gamma) lamellar grains. Microhardness tests showed that the hardness of the as-diffusion brazed interfaces, which ranges from 567 to 844 HV (15 gf, is significantly higher than that of the titanium aluminide alloy (272 HV). All post-joining heat treatments lowered substantially the hardness of the interface, as the hardness of the main phases detected at the interfacial zone after heat treating the joints is comprised between 296 and 414 HV.