Microstructure and mechanical properties of LPSO phase dominant Mg85.8Y7.1Zn7.1 and Mg85.8Y7.1Ni7.1 alloys

S.M. Zhu, R. Lapovok, J.F. Nie, Y. Estrin, S.N. Mathaudhu

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Mg85.8Y7.1Zn7.1 (Mg12Y1Zn1) and Mg85.8Y7.1Ni7.1 (Mg12Y1Ni1) alloys composed primarily of long-period stacking ordered (LPSO) phase were prepared by conventional casting and were further processed by hot extrusion or equal-channel angular pressing (ECAP) to investigate the effect of substitution of Zn with Ni on microstructure and mechanical properties. While a mixture of 18R and 14H structures of the LPSO phase was observed in the cast Mg85.8Y7.1Zn7.1 alloy after homogenisation treatment, the LPSO phase in the Mg85.8Y7.1Ni7.1 alloy was found to consist of 18R only. Beside the LPSO phase, both alloys contained small amounts of α-Mg and intermetallic phases, viz. MgZn2Y (W-phase) in the Mg85.8Y7.1Zn7.1 alloy and MgNi2 and MgNi4Y in the Mg85.8Y7.1Ni7.1 alloy. Mechanical testing of the extruded or ECAP processed alloys showed that the substitution of Zn with Ni significantly improved the strength of the Mg85.8Y7.1Zn7.1 alloy, but at the expense of ductility. The mechanical properties of the alloys are discussed in light of the microstructural observations. © 2017 Elsevier B.V.
Original languageEnglish
Pages (from-to)35-42
Number of pages8
JournalMaterials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume692
DOIs
Publication statusPublished - 24 Apr 2017

Keywords

  • Magnesium alloys
  • Long-Period Stacking Ordered (LPSO) phase
  • Mechanical properties
  • Mg–Y–Zn
  • Mg–Y–Ni

Cite this

@article{c1af23f529ea455398b35dfc84127065,
title = "Microstructure and mechanical properties of LPSO phase dominant Mg85.8Y7.1Zn7.1 and Mg85.8Y7.1Ni7.1 alloys",
abstract = "Mg85.8Y7.1Zn7.1 (Mg12Y1Zn1) and Mg85.8Y7.1Ni7.1 (Mg12Y1Ni1) alloys composed primarily of long-period stacking ordered (LPSO) phase were prepared by conventional casting and were further processed by hot extrusion or equal-channel angular pressing (ECAP) to investigate the effect of substitution of Zn with Ni on microstructure and mechanical properties. While a mixture of 18R and 14H structures of the LPSO phase was observed in the cast Mg85.8Y7.1Zn7.1 alloy after homogenisation treatment, the LPSO phase in the Mg85.8Y7.1Ni7.1 alloy was found to consist of 18R only. Beside the LPSO phase, both alloys contained small amounts of α-Mg and intermetallic phases, viz. MgZn2Y (W-phase) in the Mg85.8Y7.1Zn7.1 alloy and MgNi2 and MgNi4Y in the Mg85.8Y7.1Ni7.1 alloy. Mechanical testing of the extruded or ECAP processed alloys showed that the substitution of Zn with Ni significantly improved the strength of the Mg85.8Y7.1Zn7.1 alloy, but at the expense of ductility. The mechanical properties of the alloys are discussed in light of the microstructural observations. {\circledC} 2017 Elsevier B.V.",
keywords = "Magnesium alloys, Long-Period Stacking Ordered (LPSO) phase, Mechanical properties, Mg–Y–Zn, Mg–Y–Ni",
author = "S.M. Zhu and R. Lapovok and J.F. Nie and Y. Estrin and S.N. Mathaudhu",
year = "2017",
month = "4",
day = "24",
doi = "10.1016/j.msea.2017.03.057",
language = "English",
volume = "692",
pages = "35--42",
journal = "Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier",

}

Microstructure and mechanical properties of LPSO phase dominant Mg85.8Y7.1Zn7.1 and Mg85.8Y7.1Ni7.1 alloys. / Zhu, S.M.; Lapovok, R.; Nie, J.F.; Estrin, Y.; Mathaudhu, S.N.

In: Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing, Vol. 692, 24.04.2017, p. 35-42.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Microstructure and mechanical properties of LPSO phase dominant Mg85.8Y7.1Zn7.1 and Mg85.8Y7.1Ni7.1 alloys

AU - Zhu, S.M.

AU - Lapovok, R.

AU - Nie, J.F.

AU - Estrin, Y.

AU - Mathaudhu, S.N.

PY - 2017/4/24

Y1 - 2017/4/24

N2 - Mg85.8Y7.1Zn7.1 (Mg12Y1Zn1) and Mg85.8Y7.1Ni7.1 (Mg12Y1Ni1) alloys composed primarily of long-period stacking ordered (LPSO) phase were prepared by conventional casting and were further processed by hot extrusion or equal-channel angular pressing (ECAP) to investigate the effect of substitution of Zn with Ni on microstructure and mechanical properties. While a mixture of 18R and 14H structures of the LPSO phase was observed in the cast Mg85.8Y7.1Zn7.1 alloy after homogenisation treatment, the LPSO phase in the Mg85.8Y7.1Ni7.1 alloy was found to consist of 18R only. Beside the LPSO phase, both alloys contained small amounts of α-Mg and intermetallic phases, viz. MgZn2Y (W-phase) in the Mg85.8Y7.1Zn7.1 alloy and MgNi2 and MgNi4Y in the Mg85.8Y7.1Ni7.1 alloy. Mechanical testing of the extruded or ECAP processed alloys showed that the substitution of Zn with Ni significantly improved the strength of the Mg85.8Y7.1Zn7.1 alloy, but at the expense of ductility. The mechanical properties of the alloys are discussed in light of the microstructural observations. © 2017 Elsevier B.V.

AB - Mg85.8Y7.1Zn7.1 (Mg12Y1Zn1) and Mg85.8Y7.1Ni7.1 (Mg12Y1Ni1) alloys composed primarily of long-period stacking ordered (LPSO) phase were prepared by conventional casting and were further processed by hot extrusion or equal-channel angular pressing (ECAP) to investigate the effect of substitution of Zn with Ni on microstructure and mechanical properties. While a mixture of 18R and 14H structures of the LPSO phase was observed in the cast Mg85.8Y7.1Zn7.1 alloy after homogenisation treatment, the LPSO phase in the Mg85.8Y7.1Ni7.1 alloy was found to consist of 18R only. Beside the LPSO phase, both alloys contained small amounts of α-Mg and intermetallic phases, viz. MgZn2Y (W-phase) in the Mg85.8Y7.1Zn7.1 alloy and MgNi2 and MgNi4Y in the Mg85.8Y7.1Ni7.1 alloy. Mechanical testing of the extruded or ECAP processed alloys showed that the substitution of Zn with Ni significantly improved the strength of the Mg85.8Y7.1Zn7.1 alloy, but at the expense of ductility. The mechanical properties of the alloys are discussed in light of the microstructural observations. © 2017 Elsevier B.V.

KW - Magnesium alloys

KW - Long-Period Stacking Ordered (LPSO) phase

KW - Mechanical properties

KW - Mg–Y–Zn

KW - Mg–Y–Ni

U2 - 10.1016/j.msea.2017.03.057

DO - 10.1016/j.msea.2017.03.057

M3 - Article

VL - 692

SP - 35

EP - 42

JO - Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

ER -