Evaluation of Tensile Strength and Fatigue Strength of Commercial Pure Aluminum/Tough Pitch Copper Friction-Welded Joints by Deformation Heat Input

Ochi Hiizu, Yamamoto Yoshiaki, Yamazaki Takashi, Sawai Takeshi, Kawai Gosaku, Ogawa Koichi

doi:10.2464/jilm.57.357

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工業用純アルミニウム／タフピッチ銅摩擦圧接継手の引張強さおよび疲れ強さの変形入熱による評価
コウギョウヨウジュンアルミニウムタフピッチドウマサツアッセツツギテノヒッパリツヨサオヨビツカレツヨサノヘンケイニュウネツニヨルヒョウカ

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The relationship between joint strength and deformation heat input at the upset stage and the relationship between joint strength and upset burn-off length were examined on friction welded joints of 1050 pure aluminum to C1100 tough pitch copper. Joint quality was evaluated from the tensile strength and fatigue strength. It was found that both the deformation heat input at the upset stage and the upset burn-off length correlated well with joint strength. Additionally, when the deformation heat input at the upset stage or upset burn-off length exceeded a certain value, stable tensile strength was obtained. The mixing layer, intermetallic compounds of Al-Cu were interpolated into A1050, formed at the weld interface, and joints having a thick mixing layer fractured at the weld interface. Joint efficiencies of sound joints for the fatigue limit of the A1050 base metal were 88–100%. Judging from the fatigue limit, sound joints could be produced when either the deformation heat input at the upset stage or the upset burn-off length exceeded a certain value.

Journal

MATERIALS TRANSACTIONS

MATERIALS TRANSACTIONS 49 (12), 2786-2791, 2008

The Japan Institute of Metals and Materials

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