Super-High Strength Mg-7.5Al-0.8Zn Alloy Prepared by Rapidly Solidified Powder Metallurgy and Low Temperature Extrusion

Jian Zhu, Junxiu Liu, Yi Wang, Kuang Lu, Jinbin Chen, Zi-kui Liu, Xidong Hui

Research output: Contribution to journalArticle

Abstract

In this work, Mg-7.5Al-0.8Zn alloy with super-high tensile strength are fabricated by rapidly solidified powder metallurgy (RS/PM) and low temperature extrusion technology. By reducing extrusion temperature from 340 to 170°C, the α-Mg grains are significantly refined and numerous nanoscale β-Mg 17 Al 12 particles are obtained. The RS/PM alloy extruded at 170°C possesses the lowest grain size of ≈550nm. The nanoscale β-phase particles stimulate the nucleation of dynamically recrystallized (DRXed) grains and restrain the growth of DRXed grains. The RS/PM alloy extruded at 170°C exhibits mechanical properties with a tensile yield strength of 448MPa, an ultimate tensile strength of 480 Mpa, and a microhardness of 137 HV. These excellent mechanical properties result from low temperature extrusion are mainly attributed to the ultra-fine DRXed grains and the high-density dislocations and subgrains.

Original languageEnglish (US)
JournalAdvanced Engineering Materials
DOIs
StateAccepted/In press - Jan 1 2017

Fingerprint

powder metallurgy
Powder metallurgy
high strength
Extrusion
tensile strength
Tensile strength
mechanical properties
Mechanical properties
Temperature
temperature
yield strength
Microhardness
microhardness
Yield stress
Nucleation
grain size
nucleation

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

@article{dfe6390f89b547558a74c56fc753e251,
title = "Super-High Strength Mg-7.5Al-0.8Zn Alloy Prepared by Rapidly Solidified Powder Metallurgy and Low Temperature Extrusion",
abstract = "In this work, Mg-7.5Al-0.8Zn alloy with super-high tensile strength are fabricated by rapidly solidified powder metallurgy (RS/PM) and low temperature extrusion technology. By reducing extrusion temperature from 340 to 170°C, the α-Mg grains are significantly refined and numerous nanoscale β-Mg 17 Al 12 particles are obtained. The RS/PM alloy extruded at 170°C possesses the lowest grain size of ≈550nm. The nanoscale β-phase particles stimulate the nucleation of dynamically recrystallized (DRXed) grains and restrain the growth of DRXed grains. The RS/PM alloy extruded at 170°C exhibits mechanical properties with a tensile yield strength of 448MPa, an ultimate tensile strength of 480 Mpa, and a microhardness of 137 HV. These excellent mechanical properties result from low temperature extrusion are mainly attributed to the ultra-fine DRXed grains and the high-density dislocations and subgrains.",
author = "Jian Zhu and Junxiu Liu and Yi Wang and Kuang Lu and Jinbin Chen and Zi-kui Liu and Xidong Hui",
year = "2017",
month = "1",
day = "1",
doi = "10.1002/adem.201700712",
language = "English (US)",
journal = "Advanced Engineering Materials",
issn = "1438-1656",
publisher = "Wiley-VCH Verlag",

}

Super-High Strength Mg-7.5Al-0.8Zn Alloy Prepared by Rapidly Solidified Powder Metallurgy and Low Temperature Extrusion. / Zhu, Jian; Liu, Junxiu; Wang, Yi; Lu, Kuang; Chen, Jinbin; Liu, Zi-kui; Hui, Xidong.

In: Advanced Engineering Materials, 01.01.2017.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Super-High Strength Mg-7.5Al-0.8Zn Alloy Prepared by Rapidly Solidified Powder Metallurgy and Low Temperature Extrusion

AU - Zhu, Jian

AU - Liu, Junxiu

AU - Wang, Yi

AU - Lu, Kuang

AU - Chen, Jinbin

AU - Liu, Zi-kui

AU - Hui, Xidong

PY - 2017/1/1

Y1 - 2017/1/1

N2 - In this work, Mg-7.5Al-0.8Zn alloy with super-high tensile strength are fabricated by rapidly solidified powder metallurgy (RS/PM) and low temperature extrusion technology. By reducing extrusion temperature from 340 to 170°C, the α-Mg grains are significantly refined and numerous nanoscale β-Mg 17 Al 12 particles are obtained. The RS/PM alloy extruded at 170°C possesses the lowest grain size of ≈550nm. The nanoscale β-phase particles stimulate the nucleation of dynamically recrystallized (DRXed) grains and restrain the growth of DRXed grains. The RS/PM alloy extruded at 170°C exhibits mechanical properties with a tensile yield strength of 448MPa, an ultimate tensile strength of 480 Mpa, and a microhardness of 137 HV. These excellent mechanical properties result from low temperature extrusion are mainly attributed to the ultra-fine DRXed grains and the high-density dislocations and subgrains.

AB - In this work, Mg-7.5Al-0.8Zn alloy with super-high tensile strength are fabricated by rapidly solidified powder metallurgy (RS/PM) and low temperature extrusion technology. By reducing extrusion temperature from 340 to 170°C, the α-Mg grains are significantly refined and numerous nanoscale β-Mg 17 Al 12 particles are obtained. The RS/PM alloy extruded at 170°C possesses the lowest grain size of ≈550nm. The nanoscale β-phase particles stimulate the nucleation of dynamically recrystallized (DRXed) grains and restrain the growth of DRXed grains. The RS/PM alloy extruded at 170°C exhibits mechanical properties with a tensile yield strength of 448MPa, an ultimate tensile strength of 480 Mpa, and a microhardness of 137 HV. These excellent mechanical properties result from low temperature extrusion are mainly attributed to the ultra-fine DRXed grains and the high-density dislocations and subgrains.

UR - http://www.scopus.com/inward/record.url?scp=85038073992&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85038073992&partnerID=8YFLogxK

U2 - 10.1002/adem.201700712

DO - 10.1002/adem.201700712

M3 - Article

AN - SCOPUS:85038073992

JO - Advanced Engineering Materials

JF - Advanced Engineering Materials

SN - 1438-1656

ER -