Microstructure and corrosion behavior of Mg-Sn-Ca alloys after extrusion
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In: Transactions of Nonferrous Metals Society of China (English Edition), Vol. 19, No. 1, 02.2009, p. 40-44.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Microstructure and corrosion behavior of Mg-Sn-Ca alloys after extrusion
AU - ABU LEIL, T.
AU - HORT, N.
AU - DIETZEL, W.
AU - BLAWERT, C.
AU - HUANG, Y.
AU - KAINER, K. U.
AU - RAO, K. P.
PY - 2009/2
Y1 - 2009/2
N2 - Mg-Sn-Ca alloys promise a reasonable corrosion resistance in combination with good creep resistance, likely due to the presence of Ca2-xMgxSn and other phases. The selected alloys with 3% Sn and Ca in the range of 1%-2% have been extruded in order to achieve more homogeneous microstructure compared with the as-cast alloys. Optical microscopy(OM) and X-ray diffraction(XRD) techniques were used to study the microstructure and phases of these alloys. The corrosion behavior of these alloys was investigated by means of salt spray test and potentio-dynamic measurements. The results obtained on the alloys Mg-3Sn (T3), Mg-3Sn-1Ca (TX31), and Mg-3Sn-2Ca (TX32) indicate the presence of the same phases in as-cast and after extrusion, namely Mg2Sn, Ca2-xMgxSn, and Ca2-xMgxSn/Mg2Ca, respectively. However, due to the occurrence of extensive recrystallization in the extrusion process, the grain size has significantly reduced after extrusion. The reduction leads to the improvement of the corrosion resistance after extrusion which is then comparable with the commercial alloy AZ91D.
AB - Mg-Sn-Ca alloys promise a reasonable corrosion resistance in combination with good creep resistance, likely due to the presence of Ca2-xMgxSn and other phases. The selected alloys with 3% Sn and Ca in the range of 1%-2% have been extruded in order to achieve more homogeneous microstructure compared with the as-cast alloys. Optical microscopy(OM) and X-ray diffraction(XRD) techniques were used to study the microstructure and phases of these alloys. The corrosion behavior of these alloys was investigated by means of salt spray test and potentio-dynamic measurements. The results obtained on the alloys Mg-3Sn (T3), Mg-3Sn-1Ca (TX31), and Mg-3Sn-2Ca (TX32) indicate the presence of the same phases in as-cast and after extrusion, namely Mg2Sn, Ca2-xMgxSn, and Ca2-xMgxSn/Mg2Ca, respectively. However, due to the occurrence of extensive recrystallization in the extrusion process, the grain size has significantly reduced after extrusion. The reduction leads to the improvement of the corrosion resistance after extrusion which is then comparable with the commercial alloy AZ91D.
KW - corrosion
KW - extrusion
KW - magnesium-tin alloys
KW - microstructure
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=58649106024&partnerID=8YFLogxK
U2 - 10.1016/S1003-6326(08)60225-3
DO - 10.1016/S1003-6326(08)60225-3
M3 - Journal articles
AN - SCOPUS:58649106024
VL - 19
SP - 40
EP - 44
JO - Transactions of Nonferrous Metals Society of China (English Edition)
JF - Transactions of Nonferrous Metals Society of China (English Edition)
SN - 1003-6326
IS - 1
ER -