The influence of projectile nose shape on the morphology of interface in impact spot welds

The weld interface is investigated between copper flyer plates and brass parent plates that are impact spot welded by the use of LDPE projectiles of various nose shapes. Projectiles with a flat nose featured plane and wavy interfaces with a central unwelded zone. In contrast, projectiles with conica...

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Bibliographic Details
Published in:International journal of impact engineering 1996-09, Vol.18 (6), p.657-669
Main Authors: Turgutlu, A., Al-Hassani, S.T.S., Akyurt, M.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
flyer plate
impact
interface
Joining, thermal cutting: metallurgical aspects
Metals. Metallurgy
nose shape
parent plate
projectile
spot welding
Welding
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Summary:The weld interface is investigated between copper flyer plates and brass parent plates that are impact spot welded by the use of LDPE projectiles of various nose shapes. Projectiles with a flat nose featured plane and wavy interfaces with a central unwelded zone. In contrast, projectiles with conical noses did not display unwelded zones at the spot. Hollow ended projectiles featured shaped-charge effects, and generally resulted in welded regions comprising a central pocket, a concentric toroidal ring and concentric zones of wavy and plain regions at various radial distances. Cases involving entrapped air and jetting are observed.
ISSN:0734-743X
1879-3509
DOI:10.1016/0734-743X(95)00062-F