COVID-19 Notice: In support of local and federal COVID-19 guidelines, we are unable to process shipments after 12PM EST on Thursday, March 26th. We encourage you to consider the electronic variant offered for many of our products (i.e. Z136 Standards, Hazard Evaluation Software). We will continue to offer customer support by phone or email during our regular operating hours. Thank you for your understanding.

help desk software

Product Code: JLA_15_4_220

Tommi Jokinen
Miikka Karhu
VTT Industrial Systems, P.O. Box 17021, FIN 53851 Lappeenranta, Finland

Veli Kujanpa¨a¨
Lappeenranta University of Technology, P.O. Box 20, FIN 53851 Lappeenranta, Finland

Autogenous laser welding has shown many advantages over traditional welding methods in numerous applications. However, there could be even more applications, but due to the power levels of present high power lasers, depth of penetration is limited. One way to overcome this limitation is to use multipass laser welding, in which a narrow gap and a filler wire are applied. By this process thick sections can be welded with a smaller heat input and therefore with smaller distortions, and the process seems to be very effective compared to “traditional” welding methods. Another way to increase penetration and fill the groove is by using the so-called hybrid process, in which laser and GMAW are combined. In this study thick section austenitic stainless steel is welded using a multipass technique with filler wire, and also by utilizing a hybrid process. For narrow gap conditions, groove angles of 8°, 10°, and 12°, are used with a partially grooved V joint. Parameters (e.g, filler wire feeding, placement of wire, and arc) are varied. Results of the experiments are presented and phenomena of the process, as well as reasons for weld defects, are pointed out. © 2003 Laser Institute of America.

Product Thumbnail


Members: $25.00

Note: When applicable, multiple quantity discounts are applied once the items are added to your cart.