Browse Publications Technical Papers 2004-01-1330
2004-03-08

Microstructures and Failure Mechanisms of Spot Friction Welds in Lap-Shear Specimens of Aluminum 6111-T4 Sheets 2004-01-1330

Microstructures and failure mechanisms of spot friction welds in aluminum 6111-T4 lap-shear specimens are investigated based on experimental observations. Two types of tools, a Type I tool with a flat tool shoulder and a Type II tool with a concave tool shoulder, were used to join the aluminum sheets with different processing parameters. Optical micrographs of the cross sections of spot friction welds made by the two types of tools in lap-shear specimens before and after failure are examined. These spot friction welds show the failure mode of nugget pullout under lap-shear loading conditions. However, the micrographs show different microstructures and failure mechanisms for spot friction welds made by the two types of tools with different processing parameters. The experimental observations suggest that under lap-shear loading conditions, the failure is initiated near the stir zone in the middle part of the nugget and the failure propagates along the circumference of the nugget to final fracture.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Fatigue Behaviors of Aluminum 5754-O Spot Friction Welds in Lap-Shear Specimens

2008-01-1139

View Details

STANDARD

GASKET - ALUMINUM - NON ASBESTOS, ANNULAR

AS123020A

View Details

TECHNICAL PAPER

The Process Assurance Body Build Systems Tooling Build / Plate Build What are the Benefits?

982404

View Details

X