Effect of joint line remnant on fatigue lifetime of friction stir welded Al-Cu-Li alloy - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Science and Technology of Welding & Joining Année : 2010

Effect of joint line remnant on fatigue lifetime of friction stir welded Al-Cu-Li alloy

(1) , (1) , (1)
1

Résumé

The effect of joint line remnant (JLR) on the fatigue lifetime of friction stir welds of a 2198 Al alloy in T851 condition has been assessed experimentally. The base material, sound welds (welded in one sheet) and welds with JLR (produced via welding of two sheets with a natural oxide layer) have been investigated. A strong decrease in microhardness is found for the weak weld zone that is consistent with the reduction in tensile properties compared to the base material: 45% in yield strength and 22% in ultimate tensile strength. The fatigue strengths of sound and JLR bearing welds at 100 000 cycles (R=0·1) are reduced by 10 and 15% respectively compared to the base material. Only for one-third of the JLR bearing specimens, the fatigue crack initiated in regions close to the JLR and this without reduction in fatigue lifetime.
Fichier non déposé

Dates et versions

hal-00553188 , version 1 (06-01-2011)

Identifiants

Citer

Thomas Le Jolu, Thilo F. Morgeneyer, Anne-Françoise Gourgues-Lorenzon. Effect of joint line remnant on fatigue lifetime of friction stir welded Al-Cu-Li alloy. Science and Technology of Welding & Joining, 2010, 15, pp.694-698. ⟨10.1179/136217110X12813393169453⟩. ⟨hal-00553188⟩
56 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More