TY - CHAP

T1 - Role of SiC in grain refinement of aluminum-free Mg-Zn alloys

AU - Gu, Jian

AU - Huang, Yuanding

AU - Kainer, Karl Ulrich

AU - Hort, Norbert

N1 - Conference code: 145

PY - 2016

Y1 - 2016

N2 - The addition of SiC particles effectively refined the grains of a range of aluminum-free Mg-Zn alloys. Simultaneously, the corresponding mechanism of grain refinement has also been discussed. In the present work the effect of SiC on the microstructure of as-cast Mg-Zn alloy was investigated using optical and scanning electron microscopy. The results show that the primary alloying element Zn segregates at the grain boundaries and the phase Mg7Zn3 locates inside Mg matrix of Mg-Zn grains. The efficiency of SiC as a grain refiner can be seen with 45% average grain size reduction of Mg-3Zn alloy at 0.3 wt% SiC addition, indicating an existence of close relationship between the contents of SiC and Zn to affect the grain size. The interaction between SiC and the impurities such as Mn and Fe in Mg-Zn alloys is suggested to explain the grain refinement.

AB - The addition of SiC particles effectively refined the grains of a range of aluminum-free Mg-Zn alloys. Simultaneously, the corresponding mechanism of grain refinement has also been discussed. In the present work the effect of SiC on the microstructure of as-cast Mg-Zn alloy was investigated using optical and scanning electron microscopy. The results show that the primary alloying element Zn segregates at the grain boundaries and the phase Mg7Zn3 locates inside Mg matrix of Mg-Zn grains. The efficiency of SiC as a grain refiner can be seen with 45% average grain size reduction of Mg-3Zn alloy at 0.3 wt% SiC addition, indicating an existence of close relationship between the contents of SiC and Zn to affect the grain size. The interaction between SiC and the impurities such as Mn and Fe in Mg-Zn alloys is suggested to explain the grain refinement.

KW - Grain refinement

KW - Magnesium alloys

KW - SiC inoculation

KW - Solidification

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=84975041739&partnerID=8YFLogxK

U2 - 10.1002/9781119274803.ch36

DO - 10.1002/9781119274803.ch36

M3 - Article in conference proceedings

AN - SCOPUS:84975041739

T3 - Magnesium Technology

SP - 177

EP - 181

BT - Magnesium Technology 2016 - Held During TMS 2016

A2 - Singh, Alok

A2 - Solanki, Kiran

A2 - Manuel, Michele Viola

A2 - Neelameggham, Neale R.

PB - The Minerals, Metals & Materials Society

T2 - 145th Annual Meeting and Exhibition of Magnesium Technology - TMS 2016

Y2 - 14 February 2016 through 18 February 2016

ER -