Effect of Post Weld Heat Treatment Process on Microstructure and Mechanical Properties of Friction Welded Dissimilar Drill Pipe

Küçük Resim Yok

Tarih

2015

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Univ Fed Sao Carlos, Dept Engenharia Materials

Erişim Hakkı

info:eu-repo/semantics/openAccess

Özet

In this study, N80-42CrMo4 dissimilar drill pipes were welded by a roto-friction welding machine. A set of welded samples were tested as-welded condition. Another set of welded samples were post weld heat treated (stress relief annealing) at the temperature of 600 degrees C, for 20 min. and then tested. The microstructures of the as-welded and stress relief annealed samples were examined by optical microscope and SEM. The properties of the all welded samples were determined by hardness measurement, tension and V notch-impact tests. The high hardness especially in the weld interface resulted in low toughness. As a conclusion, the stress relief annealing treatment caused a little decrease in yield strength and ultimate tensile strength, but increase in the elongation. The ductility of samples also increased after annealing treatment which is very important for static and dynamic loads.

Açıklama

Anahtar Kelimeler

annealing procedure, dissimilar weld, friction welding

Kaynak

Materials Research-Ibero-American Journal of Materials

WoS Q Değeri

Q4

Scopus Q Değeri

Q3

Cilt

18

Sayı

3

Künye