TY - JOUR
T1 - An Al-1.5B-3P Alloy Designed for Complex Modification of a Eutectic Al-Si Alloy Based on an Al-B-P Phase Diagram
AU - Wang, Shuo
AU - Liu, Ya
AU - Tu, Hao
AU - Wang, Jianhua
AU - Su, Xuping
N1 - Publisher Copyright:
© 2019, ASM International.
PY - 2019/6/15
Y1 - 2019/6/15
N2 - The 700 °C isothermal section of an Al-B-P ternary system was analyzed by scanning electron microscopy coupled with an energy dispersive spectrometry and x-ray diffraction. The Al-1.5B-3P master alloy, designed based on the phase diagram, was used for the modification of a eutectic Al-Si alloy. The results revealed the presence of five three-phase regions in the 700 °C isothermal section of Al-B-P ternary system, namely, Liq. + AlB2 + AlP, AlB2 + AlP + BP, AlB12 + AlB2 + BP, AlB12 + BP + α-B and AlP + BP + Pgas. The phase constituents of the Al-1.5B-3P alloy are the Al, AlB2 and AlP phases. After complex modification by the Al-1.5B-3P alloy, a large number of fine α-Al dendrites and some primary Si formed in the eutectic Al-Si alloy. The morphology of eutectic Si changed from a needle-like to granular or short rod form. Compared with the unmodified eutectic Al-Si alloy, the tensile strength and elongation of the alloy modified with 0.4% Al-1.5B-3P were increased by 20 and 24%, respectively. Overall, the comprehensive mechanical properties of the modified alloy were significantly improved.
AB - The 700 °C isothermal section of an Al-B-P ternary system was analyzed by scanning electron microscopy coupled with an energy dispersive spectrometry and x-ray diffraction. The Al-1.5B-3P master alloy, designed based on the phase diagram, was used for the modification of a eutectic Al-Si alloy. The results revealed the presence of five three-phase regions in the 700 °C isothermal section of Al-B-P ternary system, namely, Liq. + AlB2 + AlP, AlB2 + AlP + BP, AlB12 + AlB2 + BP, AlB12 + BP + α-B and AlP + BP + Pgas. The phase constituents of the Al-1.5B-3P alloy are the Al, AlB2 and AlP phases. After complex modification by the Al-1.5B-3P alloy, a large number of fine α-Al dendrites and some primary Si formed in the eutectic Al-Si alloy. The morphology of eutectic Si changed from a needle-like to granular or short rod form. Compared with the unmodified eutectic Al-Si alloy, the tensile strength and elongation of the alloy modified with 0.4% Al-1.5B-3P were increased by 20 and 24%, respectively. Overall, the comprehensive mechanical properties of the modified alloy were significantly improved.
KW - Al-B-P master alloy
KW - Al-B-P ternary system
KW - Al-Si alloy
KW - modification
KW - phase diagram
UR - http://www.scopus.com/inward/record.url?scp=85065322302&partnerID=8YFLogxK
U2 - 10.1007/s11669-019-00731-1
DO - 10.1007/s11669-019-00731-1
M3 - Article
AN - SCOPUS:85065322302
SN - 1547-7037
VL - 40
SP - 375
EP - 382
JO - Journal of Phase Equilibria and Diffusion
JF - Journal of Phase Equilibria and Diffusion
IS - 3
ER -