arXiv is a preprint service and an open-access archive for scholarly articles in the fields of physics, mathematics, etc. Materials are not peer-reviewed by arXiv. (How to Cite Preprints)
Materials Science & EngineeringThis link opens in a new windowOffers coverage of metallurgy, ceramics, polymers and composites used in engineering applications. This database includes the renowned METADEX, Copper and Polymer Library databases.
PROLA - Physical Review Online ArchiveThe American Physical Society's online archive for Physical Review Letters, Reviews of Modern Physics, and Physical Review A–E. PROLA provides immediate access to the APS journal collection dating back to the first volume of each journal. Access to all journal content, except for the current year and the preceding three years.