Enhancement of ballistic capabilities of soft welds through hardfacing

Citation
Gm. Reddy et al., Enhancement of ballistic capabilities of soft welds through hardfacing, INT J IMPAC, 22(8), 1999, pp. 775-791
Citations number
17
Categorie Soggetti
Mechanical Engineering
Journal title
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
ISSN journal
0734743X → ACNP
Volume
22
Issue
8
Year of publication
1999
Pages
775 - 791
Database
ISI
SICI code
0734-743X(199909)22:8<775:EOBCOS>2.0.ZU;2-P
Abstract
An attempt has been made to improve the ballistic immunity of austenitic we lds through a hardfacing technique by a shielded metal are welding process. Welds with complete hardfacing shattered under ballistic impact. An overla y of hardfacing alloy over austenitic weld disintegrated due to extensive c racking in the hardfacing layer. Sandwiching of the hardfacing alloy weld b etween austenitic welds served the dual purpose of weld integrity and balli stic immunity due to the high hardness of hardfacing alloy and the energy a bsorbing capacity of austenitic weld deposit. However, for full ballistic i mmunity equivalent to the base metal a minimum thickness of hardfacing weld layer was found to be essential. The observed trends are explained on the basis of microstructural features and cracking behaviour in the hardfacing alloy. (C) 1999 Elsevier Science Ltd. All rights reserved.