Aluminium-rich coring structures in Mg-Al alloys with carbon inoculation
Publikation: Beiträge in Sammelwerken › Aufsätze in Konferenzbänden › Forschung › begutachtet
Standard
Aluminium-rich coring structures in Mg-Al alloys with carbon inoculation. / Huang, Yuanding; Zheng, Xiuhua; Okechukwu, Anopuo et al.
PRICM7. Hrsg. / Jian-Feng Nie; Allan Morton. Trans Tech Publications Ltd, 2010. S. 675-678 (Materials Science Forum; Band 654-656).Publikation: Beiträge in Sammelwerken › Aufsätze in Konferenzbänden › Forschung › begutachtet
Harvard
APA
Vancouver
Bibtex
}
RIS
TY - CHAP
T1 - Aluminium-rich coring structures in Mg-Al alloys with carbon inoculation
AU - Huang, Yuanding
AU - Zheng, Xiuhua
AU - Okechukwu, Anopuo
AU - Kim, Gyu Seok
AU - Kainer, Karl Ulrich
AU - Hort, Norbert
N1 - Conference code: 7
PY - 2010
Y1 - 2010
N2 - A homogeneous microstructure of as-cast magnesium alloys is necessary to improve the formability during their subsequent thermomechanical processing. In Al-containing magnesium alloys, the grain refinement by carbon inoculation is considered to be the best approach until now. However, the mechanism of grain refinement is unclear. The present work investigates the coring microstructure in Mg-Al alloys inoculated with carbon using FIB, SEM and TEM techniques. In each grain one or more "hillocks" exist, enriched with carbon, manganese and aluminium. This is possibly related to the inhomogeneous nucleation of alpha-magnesium. The precipitates in these "hillocks" are always surrounded by the aluminium-rich zones. These characteristics of microstructure observed in Mg-Al alloys with carbon inoculation are compared with that observed in Al-free magnesium alloys inoculated by zirconium. The similarities between them are discussed. A novel mechanism is suggested to explain the grain refinement in Mg-Al alloys inoculated by carbon.
AB - A homogeneous microstructure of as-cast magnesium alloys is necessary to improve the formability during their subsequent thermomechanical processing. In Al-containing magnesium alloys, the grain refinement by carbon inoculation is considered to be the best approach until now. However, the mechanism of grain refinement is unclear. The present work investigates the coring microstructure in Mg-Al alloys inoculated with carbon using FIB, SEM and TEM techniques. In each grain one or more "hillocks" exist, enriched with carbon, manganese and aluminium. This is possibly related to the inhomogeneous nucleation of alpha-magnesium. The precipitates in these "hillocks" are always surrounded by the aluminium-rich zones. These characteristics of microstructure observed in Mg-Al alloys with carbon inoculation are compared with that observed in Al-free magnesium alloys inoculated by zirconium. The similarities between them are discussed. A novel mechanism is suggested to explain the grain refinement in Mg-Al alloys inoculated by carbon.
KW - Carbon inoculation
KW - Grain refinement
KW - Magnesium alloy
KW - Microstructure
KW - Nucleation
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=77955485103&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.654-656.675
DO - 10.4028/www.scientific.net/MSF.654-656.675
M3 - Article in conference proceedings
AN - SCOPUS:77955485103
SN - 0878492550
SN - 9780878492558
T3 - Materials Science Forum
SP - 675
EP - 678
BT - PRICM7
A2 - Nie, Jian-Feng
A2 - Morton, Allan
PB - Trans Tech Publications Ltd
T2 - 7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
Y2 - 2 August 2010 through 6 August 2010
ER -