MICROPARTICULATE EMISSIONS IN 2195-ALUMINUM-LITHIUM ALLOY WELDMENTS

Authors
NUNES AC ZAIDI AA RAVI TS TALIA JE
Citation
Ac. Nunes et al., MICROPARTICULATE EMISSIONS IN 2195-ALUMINUM-LITHIUM ALLOY WELDMENTS, High-temperature materials and processes, 17(4), 1998, pp. 313-318
Citations number
5
Categorie Soggetti
Material Science
Journal title
High-temperature materials and processes → ACNP
ISSN journal
03346455
Volume
17
Issue
4
Year of publication
1998
Pages
313 - 318
Database
ISI
SICI code
0334-6455(1998)17:4<313:MEI2AW>2.0.ZU;2-H
Abstract
Microparticulate Emission (MPE) from Variable Polarity Plasma Are (VPP A) welds in 2195 aluminum-lithium alloy is described. It takes various forms herein labelled ''Smut'', ''Snow'', and ''Lava''. It is attribu ted to a gas generating reaction taking place at molten grain boundari es or crack surfaces. The reaction could be a release of hydrogen disp laced from lithium-hydride by an influx of dissolved nitrogen. There a ppears to be a close link between cracking and MPE.