Effect of yttrium addition and the powder size on oxide film and powder ignition temperature of AZ91D magnesium alloy

Lin, Pengyu; Zhou, Hong; Wang, Mingxing; Guo, Qing-chun; Tang, Heng-chen; Li, Wei

doi:10.1016/j.jallcom.2009.02.132

Cited by 15 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Studies on the high temperature behavior of Mg-Al alloys modified with RE elements are often focused on the effect of Ce or Y addition on the ignition point [10][11][12][13][14][15][16]. Given that this point is normally above 437°C and the b-Mg 17 Al 12 phase melts above this temperature [17], the beneficial effect of RE elements is often associated with the reduction of the volume fraction of b-Mg 17 Al 12 phase, caused by precipitation of Al 11 RE 3 particles with high melting point along the grain boundaries [18,19].…”

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of AZ91D Magnesium Alloy Containing Nd or Gd

et al. 2011

View full text Add to dashboard Cite

The influence of Nd and Gd additions on the evolution of microstructure, surface hardness and oxidation behavior of the extruded AZ91D magnesium alloy exposed to air was investigated in the temperature range from 290 to 410°C. The kinetics of the oxidation process was obtained from gravimetric measurements performed during 28 days. Nd and Gd formed Al-rich intermetallic compounds (Al 2 Gd, Al 2 Nd, Al-Mn-Gd and Al-Mn-Nd) and reduced the volume fraction of b-Mg 17 Al 12 phase. Surface degradation of the AZ91D alloy, with and without Gd or Nd, was negligible for temperatures below 370°C. At 410°C, the grain size and oxidation rate significantly increased, although lanthanide-containing alloys revealed lower degradation compared with the unmodified AZ91D alloy.

show abstract

Section: Introductionmentioning

confidence: 99%

Oxidation Behavior of AZ91D Magnesium Alloy Containing Nd or Gd

et al. 2011

View full text Add to dashboard Cite

show abstract

“…However, MgO can crack easily and Mg(OH) 2 can roll up due to residual stress [32,33]. Therefore, the composition and structure of the oxide/hydroxide film are often reinforced by adding an active metal [34][35][36][37][38], such as aluminum [39], or a heavy metal (such as iron and nickel) [40][41][42][43][44][45][46][47][48][49][50]. However, precipitates, such as heavy metal-magnesium compounds, act as local cathodes during corrosion [51], which has prompted the development of low heavy metal content alloys.…”

Section: Introductionmentioning

confidence: 99%

Corrosion resistance of Mg–5Al–xSr alloys

Nam

Kim

et al. 2011

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…All the rare‐earth alloying elements improved resistance to ignition19–26 as described in the literature study in the previous work2 Detached blobs for Mg3Ce, Mg5Gd, and Mg5Nd, all exhibited mechanically robust oxide films, and did not burn. The Mg0.6Nd detached blob showed delayed burning.…”

Section: Discussionmentioning

confidence: 64%

Flammability of Mg–X Binary Alloys

2012

View full text Add to dashboard Cite

This research builds on our prior studies on Mg flammability. [1,2] Magnesium (Mg) alloys have a low density, good damping characteristics, good machinability, and a good strength to weight ratio. However, Mg is inherently reactive so that Mg alloys are prone to oxidation. They have moderate corrosion resistance [3][4][5][6] and Mg alloys require a cover gas during melting. [7] Significant research has been carried out on protecting Mg alloys during melting. [2] There has however been limited work done to study Mg alloys directly exposed to a flame. [8][9][10] Our previous work [2] studied the influence of Al and Y on the flammability of Mg alloys. One end of a cylindrical specimen was exposed to a free diffusion, liquid petroleum gas (LPG) flame. There were important differences in the ignition characteristic for HP Mg, AZ61, and AZ91 of (i) the cylindrical Mg specimens subjected to direct LPG flame impingement on the specimen tip, and (ii) a hot detached blob of molten metal detached from the specimen tip. The cylindrical specimen tip required direct continued exposure of the LPG flame to ignite, and extinguished once the LPG flame was withdrawn. Ignition required at least partial melting. The hot detached un-ignited molten blob, detached from the specimen tip, ignited readily even without the exposure to the LPG flame. Burning was COMMUNICATION

show abstract

Effect of yttrium addition and the powder size on oxide film and powder ignition temperature of AZ91D magnesium alloy

Cited by 15 publications

References 14 publications

Oxidation Behavior of AZ91D Magnesium Alloy Containing Nd or Gd

Oxidation Behavior of AZ91D Magnesium Alloy Containing Nd or Gd

Corrosion resistance of Mg–5Al–xSr alloys

Flammability of Mg–X Binary Alloys

Contact Info

Product

Resources

About