Stress corrosion cracking of magnesium (Mg) alloys

Atrens, A., Winzer, N., Dietzel, W., Srinivasan, P. B. and Song, G. -L. (2011). Stress corrosion cracking of magnesium (Mg) alloys. In Corrosion of magnesium alloys (pp. 299-364) Cambridge, United Kingdom: Woodhead.

Author Atrens, A.
Winzer, N.
Dietzel, W.
Srinivasan, P. B.
Song, G. -L.
Title of chapter Stress corrosion cracking of magnesium (Mg) alloys
Title of book Corrosion of magnesium alloys
Place of Publication Cambridge, United Kingdom
Publisher Woodhead
Publication Year 2011
Sub-type Critical review of research, literature review, critical commentary
Open Access Status
ISBN 9781845697082
Chapter number 8
Start page 299
End page 364
Total pages 34
Total chapters 17
Language eng
Formatted Abstract/Summary
This chapter reviews current research into stress corrosion cracking (SCC) in magnesium (Mg) alloys, particularly intergranular stress corrosion cracking (IGSCC) and transgranular stress corrosion cracking (TGSCC).

A nearly continuous second phase along grain boundaries causes IGSCC. The second phase accelerates corrosion of the adjacent matrix by micro- galvanic corrosion; the applied stress opens the crack and allows propagation through the alloy. IGSCC can be avoided by appropriate Mg alloy design. TGSCC is the intrinsic form of SCC. This is caused by an interaction of hydrogen (H) with the microstructure, so a study of H-trap interactions is needed to understand this damage mechanism, and in order to design alloys more resistant to TGSCC. This understanding is urgently needed if Mg alloys are to be used safely in service because prior research indicates that many Mg alloys have a threshold stress for SCC of the order of half the yield stress in common environments, including high-purity water
Keyword Magnesium
Stress corrosion cracking
Q-Index Code B1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Book Chapter
Collection: School of Mechanical & Mining Engineering Publications
Version Filter Type
Citation counts: Google Scholar Search Google Scholar
Created: Thu, 20 Mar 2014, 10:18:48 EST by Alex Fitzgerald on behalf of School of Mechanical and Mining Engineering