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Intermetallic phase evolution and strengthening effect in Al–Mg2Si alloys with different Cu/Ni ratios

Journal Article


Abstract


  • Microalloying of an Al–15%Mg2Si alloy (wt%) with Ni and Cu produced an enhanced strengthening response, increasing hardness whilst also improving tensile strength due to the formation and evolution of intermetallic phases. With the increase of Cu/Ni ratios, intermetallic phases translate from Al3Ni or Al3CuNi to Al7Cu4Ni, and the total volume fraction of Al3CuNi and Al7Cu4Ni increases to 3.51% (1%Ni and 5%Cu, Cu/Ni ratio = 5). The thermally stable Al3CuNi and Al7Cu4Ni phases are connected to each other forming chains and tend to build up a network. As a result, the ultimate tensile strength (at 350 °C) of the alloy (Cu/Ni ratio = 5) reached up to 132 MPa, 131.6% higher than that of Al–15%Mg2Si alloy.

UOW Authors


  •   Sun, Yilin (external author)
  •   Li, Chong (external author)
  •   Liu, Yongchang (external author)
  •   Yu, Liming (external author)
  •   Li, Hui Jun.

Publication Date


  • 2018

Citation


  • Sun, Y., Li, C., Liu, Y., Yu, L. & Li, H. (2018). Intermetallic phase evolution and strengthening effect in Al–Mg2Si alloys with different Cu/Ni ratios. Materials Letters, 215 254-258.

Scopus Eid


  • 2-s2.0-85039748177

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1002

Number Of Pages


  • 4

Start Page


  • 254

End Page


  • 258

Volume


  • 215

Place Of Publication


  • Netherlands

Abstract


  • Microalloying of an Al–15%Mg2Si alloy (wt%) with Ni and Cu produced an enhanced strengthening response, increasing hardness whilst also improving tensile strength due to the formation and evolution of intermetallic phases. With the increase of Cu/Ni ratios, intermetallic phases translate from Al3Ni or Al3CuNi to Al7Cu4Ni, and the total volume fraction of Al3CuNi and Al7Cu4Ni increases to 3.51% (1%Ni and 5%Cu, Cu/Ni ratio = 5). The thermally stable Al3CuNi and Al7Cu4Ni phases are connected to each other forming chains and tend to build up a network. As a result, the ultimate tensile strength (at 350 °C) of the alloy (Cu/Ni ratio = 5) reached up to 132 MPa, 131.6% higher than that of Al–15%Mg2Si alloy.

UOW Authors


  •   Sun, Yilin (external author)
  •   Li, Chong (external author)
  •   Liu, Yongchang (external author)
  •   Yu, Liming (external author)
  •   Li, Hui Jun.

Publication Date


  • 2018

Citation


  • Sun, Y., Li, C., Liu, Y., Yu, L. & Li, H. (2018). Intermetallic phase evolution and strengthening effect in Al–Mg2Si alloys with different Cu/Ni ratios. Materials Letters, 215 254-258.

Scopus Eid


  • 2-s2.0-85039748177

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers1/1002

Number Of Pages


  • 4

Start Page


  • 254

End Page


  • 258

Volume


  • 215

Place Of Publication


  • Netherlands