A new Zr-rich intermetallic phase in an Al-14Si-3Cu-4.5Ni casting alloy with trace additions of Zr

Min Su Jo, Young Hee Cho, Jung Moo Lee, Su Hyeon Kim, Jun Yun Kang, Jae Gil Jung, Soo Bae Kim, Jae il Jang

Research output: Contribution to journalArticle

Abstract

A trace addition of Zr to a multicomponent Al-14Si-3Cu-4.5Ni casting alloy has often been found to form a coarse plate-like Zr-rich intermetallic compound with a size of a few tens of μm at the beginning of solidification. Evaluation of the phase composition has confirmed that the Zr-rich intermetallic phase consists of multicomponent constituent elements, mainly Al, Si, Ni and Fe, and is present in a form of (Al,Si)3(Zr,Ni,Fe). The existence of such a complex (Al,Si)3(Zr,Ni,Fe) phase has not yet been predicted by phase equilibria calculation of the multicomponent Al-14Si-CuNiMg systems. In this paper, transmission electron microscopy studies combined with electron backscattered diffraction pattern analysis reveals the crystallography information of the (Al,Si)3(Zr,Ni,Fe) phase for the first time and identifies it as a modified Al3Zr-D023 crystal (tetragonal, I4/mmm(139)) with slightly changed lattice parameters of a = b = 3.275 Å and c = 15.475 Å. The primary (Al,Si)3(Zr,Ni,Fe) phase is found to nucleate directly onto AlP particles. The mechanical properties of the Zr-rich intermetallics were also investigated using nanoindentation at both room and elevated temperatures and were compared to those of the Si phase.

Original languageEnglish
Article number106667
JournalIntermetallics
Volume117
DOIs
StatePublished - 2020 Feb

Fingerprint

Intermetallics
Casting
Crystallography
Nanoindentation
Phase composition
Electron diffraction
Phase equilibria
Diffraction patterns
Lattice constants
Solidification
Transmission electron microscopy
Mechanical properties
Crystals
Temperature

Keywords

  • Al-Si casting alloy
  • High temperature mechanical properties
  • Microstructure characterization
  • Multicomponent
  • Nucleation
  • Zr-rich intermetallics

Cite this

Jo, Min Su ; Cho, Young Hee ; Lee, Jung Moo ; Kim, Su Hyeon ; Kang, Jun Yun ; Jung, Jae Gil ; Kim, Soo Bae ; Jang, Jae il. / A new Zr-rich intermetallic phase in an Al-14Si-3Cu-4.5Ni casting alloy with trace additions of Zr. In: Intermetallics. 2020 ; Vol. 117.
@article{f49c9fee67554d94a8445331835b0e07,
title = "A new Zr-rich intermetallic phase in an Al-14Si-3Cu-4.5Ni casting alloy with trace additions of Zr",
abstract = "A trace addition of Zr to a multicomponent Al-14Si-3Cu-4.5Ni casting alloy has often been found to form a coarse plate-like Zr-rich intermetallic compound with a size of a few tens of μm at the beginning of solidification. Evaluation of the phase composition has confirmed that the Zr-rich intermetallic phase consists of multicomponent constituent elements, mainly Al, Si, Ni and Fe, and is present in a form of (Al,Si)3(Zr,Ni,Fe). The existence of such a complex (Al,Si)3(Zr,Ni,Fe) phase has not yet been predicted by phase equilibria calculation of the multicomponent Al-14Si-CuNiMg systems. In this paper, transmission electron microscopy studies combined with electron backscattered diffraction pattern analysis reveals the crystallography information of the (Al,Si)3(Zr,Ni,Fe) phase for the first time and identifies it as a modified Al3Zr-D023 crystal (tetragonal, I4/mmm(139)) with slightly changed lattice parameters of a = b = 3.275 {\AA} and c = 15.475 {\AA}. The primary (Al,Si)3(Zr,Ni,Fe) phase is found to nucleate directly onto AlP particles. The mechanical properties of the Zr-rich intermetallics were also investigated using nanoindentation at both room and elevated temperatures and were compared to those of the Si phase.",
keywords = "Al-Si casting alloy, High temperature mechanical properties, Microstructure characterization, Multicomponent, Nucleation, Zr-rich intermetallics",
author = "Jo, {Min Su} and Cho, {Young Hee} and Lee, {Jung Moo} and Kim, {Su Hyeon} and Kang, {Jun Yun} and Jung, {Jae Gil} and Kim, {Soo Bae} and Jang, {Jae il}",
year = "2020",
month = "2",
doi = "10.1016/j.intermet.2019.106667",
language = "English",
volume = "117",
journal = "Intermetallics",
issn = "0966-9795",

}

A new Zr-rich intermetallic phase in an Al-14Si-3Cu-4.5Ni casting alloy with trace additions of Zr. / Jo, Min Su; Cho, Young Hee; Lee, Jung Moo; Kim, Su Hyeon; Kang, Jun Yun; Jung, Jae Gil; Kim, Soo Bae; Jang, Jae il.

In: Intermetallics, Vol. 117, 106667, 02.2020.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A new Zr-rich intermetallic phase in an Al-14Si-3Cu-4.5Ni casting alloy with trace additions of Zr

AU - Jo, Min Su

AU - Cho, Young Hee

AU - Lee, Jung Moo

AU - Kim, Su Hyeon

AU - Kang, Jun Yun

AU - Jung, Jae Gil

AU - Kim, Soo Bae

AU - Jang, Jae il

PY - 2020/2

Y1 - 2020/2

N2 - A trace addition of Zr to a multicomponent Al-14Si-3Cu-4.5Ni casting alloy has often been found to form a coarse plate-like Zr-rich intermetallic compound with a size of a few tens of μm at the beginning of solidification. Evaluation of the phase composition has confirmed that the Zr-rich intermetallic phase consists of multicomponent constituent elements, mainly Al, Si, Ni and Fe, and is present in a form of (Al,Si)3(Zr,Ni,Fe). The existence of such a complex (Al,Si)3(Zr,Ni,Fe) phase has not yet been predicted by phase equilibria calculation of the multicomponent Al-14Si-CuNiMg systems. In this paper, transmission electron microscopy studies combined with electron backscattered diffraction pattern analysis reveals the crystallography information of the (Al,Si)3(Zr,Ni,Fe) phase for the first time and identifies it as a modified Al3Zr-D023 crystal (tetragonal, I4/mmm(139)) with slightly changed lattice parameters of a = b = 3.275 Å and c = 15.475 Å. The primary (Al,Si)3(Zr,Ni,Fe) phase is found to nucleate directly onto AlP particles. The mechanical properties of the Zr-rich intermetallics were also investigated using nanoindentation at both room and elevated temperatures and were compared to those of the Si phase.

AB - A trace addition of Zr to a multicomponent Al-14Si-3Cu-4.5Ni casting alloy has often been found to form a coarse plate-like Zr-rich intermetallic compound with a size of a few tens of μm at the beginning of solidification. Evaluation of the phase composition has confirmed that the Zr-rich intermetallic phase consists of multicomponent constituent elements, mainly Al, Si, Ni and Fe, and is present in a form of (Al,Si)3(Zr,Ni,Fe). The existence of such a complex (Al,Si)3(Zr,Ni,Fe) phase has not yet been predicted by phase equilibria calculation of the multicomponent Al-14Si-CuNiMg systems. In this paper, transmission electron microscopy studies combined with electron backscattered diffraction pattern analysis reveals the crystallography information of the (Al,Si)3(Zr,Ni,Fe) phase for the first time and identifies it as a modified Al3Zr-D023 crystal (tetragonal, I4/mmm(139)) with slightly changed lattice parameters of a = b = 3.275 Å and c = 15.475 Å. The primary (Al,Si)3(Zr,Ni,Fe) phase is found to nucleate directly onto AlP particles. The mechanical properties of the Zr-rich intermetallics were also investigated using nanoindentation at both room and elevated temperatures and were compared to those of the Si phase.

KW - Al-Si casting alloy

KW - High temperature mechanical properties

KW - Microstructure characterization

KW - Multicomponent

KW - Nucleation

KW - Zr-rich intermetallics

UR - http://www.scopus.com/inward/record.url?scp=85075584119&partnerID=8YFLogxK

U2 - 10.1016/j.intermet.2019.106667

DO - 10.1016/j.intermet.2019.106667

M3 - Article

AN - SCOPUS:85075584119

VL - 117

JO - Intermetallics

JF - Intermetallics

SN - 0966-9795

M1 - 106667

ER -