Effect of Alloying with Rare-Earth Metals on the Degradation of Magnesium Alloys Studied Using a Combination of Isothermal Calorimetry and Pressure Measurements

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceeding

Abstract

With all the versatility in structural performance and recent progress in developing magnesium alloys, their Achilles heel remains to be degradation or corrosion property. While applications in mobility demand corrosion protection by all means, bio-medical applications of Mg alloys require well-controlled degradation rates. Meeting these requirements is only possible through the understanding of phenomena on surface–environment interfaces and the characteristics of Mg alloys affecting them. In this study, in situ monitoring during immersion testing along with 3D-optical and scanning-electron microscopy were used for assessing structure-performance characteristics. The effect of alloying with rare-earth metals on the degradation of magnesium has been studied in three model alloys Mg–0.8Nd, Mg–0.2Zr and Mg–2.0Gd using a combination of isothermal calorimetry and pressure measurements. The combination appears to be a powerful method to study corrosion of magnesium. The degradation of the Gd-containing alloy is approximately 100 times that of the other two alloys studied and is associated with the release of heat and hydrogen gas in large quantities. Differences in the morphology of corrosion products on Mg–0.8Nd and Mg–0.2Zr alloy surfaces can be associated with minute variations in the degradation process detected by the developed method.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Helmholtz-Zentrum Geesthacht
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Metallurgi och metalliska material

Nyckelord

Originalspråkengelska
Titel på värdpublikationMagnesium Technology, 2019
RedaktörerNeale R. Neelameggham, J. Brian Jordon, Dmytro Orlov, Vineet V. Joshi
FörlagSpringer
Sidor121-126
Antal sidor6
ISBN (tryckt)9783030057886
StatusPublished - 2019
PublikationskategoriForskning
Peer review utfördJa
EvenemangMagnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2019 - San Antonio, USA
Varaktighet: 2019 mar 102019 mar 14

Publikationsserier

NamnMinerals, Metals and Materials Series
ISSN (tryckt)2367-1181
ISSN (elektroniskt)2367-1696

Konferens

KonferensMagnesium Technology Symposium held at the TMS Annual Meeting and Exhibition, 2019
LandUSA
OrtSan Antonio
Period2019/03/102019/03/14