Local-electrode atom-probe tomographic investigation of strengthening precipitates in A Mg-7Zv-3Al alloy at peak hardness

Shengjun Zhang; Gregory B Olson

Local-electrode atom-probe tomographic investigation of strengthening precipitates in A Mg-7Zv-3Al alloy at peak hardness

Shengjun Zhang^*, Gregory B Olson

^*Corresponding author for this work

Materials Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The precipitates in the Mg-7Zn-3Al (in wt.%) alloy aged to peak hardness at 150°C have been characterized by local-electrode atom-probe (LEAP) tomography. The chemical compositions of the matrix and the precipitates were measured and compared with the results calculated using the COST2 database by the Thermo-Calc software. Ternary nanoscale precipitates have been found consistent with the predicted φ phase demonstrating a metastable composition. The measured particle size at peak hardness, corresponding to an equivalent sphere radius of 17 nm, provides an important calibration point for quantitative modeling of precipitation strengthening for alloy design. The interfacial energy is also determined based on the capillarity effect.

Original language	English (US)
Title of host publication	Magnesium Technology 2008
Pages	113-116
Number of pages	4
State	Published - Jun 30 2008
Event	Magnesium Technology 2008 - New Orleans, LA, United States Duration: Mar 9 2008 → Mar 13 2008

Other

Other	Magnesium Technology 2008
Country/Territory	United States
City	New Orleans, LA
Period	3/9/08 → 3/13/08

Keywords

LEAP tomography
Mg alloys
Precipitation strengthening

ASJC Scopus subject areas

Engineering(all)

Cite this

@inproceedings{64228524fec34d3b891f96a4fb17fbec,

title = "Local-electrode atom-probe tomographic investigation of strengthening precipitates in A Mg-7Zv-3Al alloy at peak hardness",

abstract = "The precipitates in the Mg-7Zn-3Al (in wt.%) alloy aged to peak hardness at 150°C have been characterized by local-electrode atom-probe (LEAP) tomography. The chemical compositions of the matrix and the precipitates were measured and compared with the results calculated using the COST2 database by the Thermo-Calc software. Ternary nanoscale precipitates have been found consistent with the predicted φ phase demonstrating a metastable composition. The measured particle size at peak hardness, corresponding to an equivalent sphere radius of 17 nm, provides an important calibration point for quantitative modeling of precipitation strengthening for alloy design. The interfacial energy is also determined based on the capillarity effect.",

keywords = "LEAP tomography, Mg alloys, Precipitation strengthening",

author = "Shengjun Zhang and Olson, {Gregory B}",

year = "2008",

month = jun,

day = "30",

language = "English (US)",

isbn = "9780873397117",

pages = "113--116",

booktitle = "Magnesium Technology 2008",

note = "Magnesium Technology 2008 ; Conference date: 09-03-2008 Through 13-03-2008",

}

TY - GEN

T1 - Local-electrode atom-probe tomographic investigation of strengthening precipitates in A Mg-7Zv-3Al alloy at peak hardness

AU - Zhang, Shengjun

AU - Olson, Gregory B

PY - 2008/6/30

Y1 - 2008/6/30

N2 - The precipitates in the Mg-7Zn-3Al (in wt.%) alloy aged to peak hardness at 150°C have been characterized by local-electrode atom-probe (LEAP) tomography. The chemical compositions of the matrix and the precipitates were measured and compared with the results calculated using the COST2 database by the Thermo-Calc software. Ternary nanoscale precipitates have been found consistent with the predicted φ phase demonstrating a metastable composition. The measured particle size at peak hardness, corresponding to an equivalent sphere radius of 17 nm, provides an important calibration point for quantitative modeling of precipitation strengthening for alloy design. The interfacial energy is also determined based on the capillarity effect.

AB - The precipitates in the Mg-7Zn-3Al (in wt.%) alloy aged to peak hardness at 150°C have been characterized by local-electrode atom-probe (LEAP) tomography. The chemical compositions of the matrix and the precipitates were measured and compared with the results calculated using the COST2 database by the Thermo-Calc software. Ternary nanoscale precipitates have been found consistent with the predicted φ phase demonstrating a metastable composition. The measured particle size at peak hardness, corresponding to an equivalent sphere radius of 17 nm, provides an important calibration point for quantitative modeling of precipitation strengthening for alloy design. The interfacial energy is also determined based on the capillarity effect.

KW - LEAP tomography

KW - Mg alloys

KW - Precipitation strengthening

UR - http://www.scopus.com/inward/record.url?scp=45749094198&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=45749094198&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:45749094198

SN - 9780873397117

SP - 113

EP - 116

BT - Magnesium Technology 2008

T2 - Magnesium Technology 2008

Y2 - 9 March 2008 through 13 March 2008

ER -

Local-electrode atom-probe tomographic investigation of strengthening precipitates in A Mg-7Zv-3Al alloy at peak hardness

Abstract

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Keywords

ASJC Scopus subject areas

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