Effect of porosity content on the weldability of powder metal parts produced by friction stir welding
Power Metallurgy World Congress and Exhibition 2006, Busan, Güney Kore, 24 - 28 Eylül 2006, ss.789-790, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Cilt numarası:
- Doi Numarası: 10.4028/www.scientific.net/msf.534-536.789
- Basıldığı Şehir: Busan
- Basıldığı Ülke: Güney Kore
- Sayfa Sayıları: ss.789-790
- Anahtar Kelimeler: friction stir welding, aluminium, powder metallurgy, porosity, ALUMINUM
- Gazi Üniversitesi Adresli: Evet
Özet
Friction stir welding technique (FSW) has many advantages in terms of tool design, rotational speed and traveling speed, and can be adjusted in a precise manner. It enables heat input into the system to be controlled. In this study, Aluminum powders were compacted at 350,400 and 450 MPa pressure and sintered at 450 degrees C temperature for 30 minutes in Ar atmosphere. Sintered powder metal parts were joined to each other by FSW at the speed of 1800 rpm and traveling welding speed 200 mm/min under a constant friction force. The results show that the amount of porosity affects the welclability of powder metallurgy (P/M) parts. Furthermore, the porosity and microstructural evolution of the Aluminum also affected the hardness values of the tested materials.