Hierarchical ultrafine-grained network mediated high strength and large plasticity in an Al-based alloy

Longchao Zhuo; Hui Wang; Tao Zhang

doi:10.1016/j.matlet.2014.03.040

Hierarchical ultrafine-grained network mediated high strength and large plasticity in an Al-based alloy

Longchao Zhuo^*
, Hui Wang
, Tao Zhang

^*Corresponding author for this work

School of Materials Science and Engineering

Tsinghua University

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

An in-situ ultrafine-grained/nanocrystalline Al-based bulk alloy with ultrahigh strength and large compressive plasticity has been produced by copper mold casting. According to the microstructural investigations, hierarchical ultrafine-grained/nanocrystalline eutectic colonies consisting of α-Al and Y₃Al₂ with homogeneously embedded Ag₂Al nano-particles have been observed, besides few submicron-sized Al ₉Co₂. The macroscopic and microscopic structural heterogeneities are able to achieve ultrahigh strength of ~1.5 GPa and large plasticity of ~28%, which are considered to be attributed to the hierarchical network of strengthening intermetallic phases combining with deformable α-Al solid solution suppressing the propagation of microcracks or shear bands. This may promote another perspective on designing and obtaining ductile ultrahigh-strength Al-based alloys.

Original language	English
Pages (from-to)	28-31
Number of pages	4
Journal	Materials Letters
Volume	124
DOIs	https://doi.org/10.1016/j.matlet.2014.03.040
State	Published - 1 Jun 2014

Keywords

Metals and alloys
Microstructure
Nanocomposites
Structural

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10.1016/j.matlet.2014.03.040

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title = "Hierarchical ultrafine-grained network mediated high strength and large plasticity in an Al-based alloy",

abstract = "An in-situ ultrafine-grained/nanocrystalline Al-based bulk alloy with ultrahigh strength and large compressive plasticity has been produced by copper mold casting. According to the microstructural investigations, hierarchical ultrafine-grained/nanocrystalline eutectic colonies consisting of α-Al and Y3Al2 with homogeneously embedded Ag2Al nano-particles have been observed, besides few submicron-sized Al 9Co2. The macroscopic and microscopic structural heterogeneities are able to achieve ultrahigh strength of \textasciitilde{}1.5 GPa and large plasticity of \textasciitilde{}28\%, which are considered to be attributed to the hierarchical network of strengthening intermetallic phases combining with deformable α-Al solid solution suppressing the propagation of microcracks or shear bands. This may promote another perspective on designing and obtaining ductile ultrahigh-strength Al-based alloys.",

keywords = "Metals and alloys, Microstructure, Nanocomposites, Structural",

author = "Longchao Zhuo and Hui Wang and Tao Zhang",

year = "2014",

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doi = "10.1016/j.matlet.2014.03.040",

language = "英语",

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pages = "28--31",

journal = "Materials Letters",

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TY - JOUR

T1 - Hierarchical ultrafine-grained network mediated high strength and large plasticity in an Al-based alloy

AU - Zhuo, Longchao

AU - Wang, Hui

AU - Zhang, Tao

PY - 2014/6/1

Y1 - 2014/6/1

N2 - An in-situ ultrafine-grained/nanocrystalline Al-based bulk alloy with ultrahigh strength and large compressive plasticity has been produced by copper mold casting. According to the microstructural investigations, hierarchical ultrafine-grained/nanocrystalline eutectic colonies consisting of α-Al and Y3Al2 with homogeneously embedded Ag2Al nano-particles have been observed, besides few submicron-sized Al 9Co2. The macroscopic and microscopic structural heterogeneities are able to achieve ultrahigh strength of ~1.5 GPa and large plasticity of ~28%, which are considered to be attributed to the hierarchical network of strengthening intermetallic phases combining with deformable α-Al solid solution suppressing the propagation of microcracks or shear bands. This may promote another perspective on designing and obtaining ductile ultrahigh-strength Al-based alloys.

AB - An in-situ ultrafine-grained/nanocrystalline Al-based bulk alloy with ultrahigh strength and large compressive plasticity has been produced by copper mold casting. According to the microstructural investigations, hierarchical ultrafine-grained/nanocrystalline eutectic colonies consisting of α-Al and Y3Al2 with homogeneously embedded Ag2Al nano-particles have been observed, besides few submicron-sized Al 9Co2. The macroscopic and microscopic structural heterogeneities are able to achieve ultrahigh strength of ~1.5 GPa and large plasticity of ~28%, which are considered to be attributed to the hierarchical network of strengthening intermetallic phases combining with deformable α-Al solid solution suppressing the propagation of microcracks or shear bands. This may promote another perspective on designing and obtaining ductile ultrahigh-strength Al-based alloys.

KW - Metals and alloys

KW - Microstructure

KW - Nanocomposites

KW - Structural

UR - https://www.scopus.com/pages/publications/84897097308

U2 - 10.1016/j.matlet.2014.03.040

DO - 10.1016/j.matlet.2014.03.040

M3 - 文章

AN - SCOPUS:84897097308

SN - 0167-577X

VL - 124

SP - 28

EP - 31

JO - Materials Letters

JF - Materials Letters

ER -

Hierarchical ultrafine-grained network mediated high strength and large plasticity in an Al-based alloy

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Keywords

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