Microstructural effects of Zn/Mg ratio and post heat treatment on tensile properties of friction stirred process (FSP) Al-xZn-yMg alloys

Ming Hsiang Ku, Fei-Yi Hung, Truan-Sheng Lui, Li Hui Chen, Wen Ting Chiang

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The workability and ductility of Al-Zn-Mg alloy are lower. In this study, the Zn content (4.44-6.34 mass%) was reduced and the Mg content (1.11-1.28 mass%) was raised to investigate the relationship between microstructures and tensile mechanical properties of Al-xZn-yMg aluminum alloys after friction stir process (FSP). The ZM35 alloy (Zn/Mg ratio is 3.5) and the ZM57 alloy (Zn/Mg ratio is 5.7) had a friction stir process and then three artificial aging treatments were performed to discuss the effects of Zn/Mg ratio on mechanical properties. After FSP and then natural aging for 12 days, the results of the experiment showed that the tensile strengths of ZM35 and ZM57 alloys were lower than the base metal (extruded material with T6, no FSP). Notably, the strength of as-FSP specimens was promoted after aging treatments. Through the mode I (80°C/16 h) treatments and the mode II (80°C/16 h + T6) treatment, the strengths of ZM35 alloy and ZM57 alloy were improved. However, after the mode III (T4 + 80°C/16 h + T6) treatment, the tensile strength and ductility of the ZM57 alloy reduced, and the deterioration rate of ductility reached to 65%; the ZM35 alloy possessed a better ductility, which confirmed the fact that decreasing Zn/Mg ratio improved the workability of friction stir Al-Zn-Mg specimens with an artificial aging treatments.

Original languageEnglish
Pages (from-to)995-1001
Number of pages7
JournalMaterials Transactions
Volume53
Issue number5
DOIs
Publication statusPublished - 2012 Oct 5

Fingerprint

tensile properties
Tensile properties
heat treatment
friction
Heat treatment
Friction
Ductility
ductility
Aging of materials
tensile strength
Tensile strength
Mechanical properties
mechanical properties
Deterioration
deterioration
Aluminum alloys
aluminum alloys
Metals
Microstructure
microstructure

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

@article{0247a44e48324ed5ac20d020cddb7972,
title = "Microstructural effects of Zn/Mg ratio and post heat treatment on tensile properties of friction stirred process (FSP) Al-xZn-yMg alloys",
abstract = "The workability and ductility of Al-Zn-Mg alloy are lower. In this study, the Zn content (4.44-6.34 mass{\%}) was reduced and the Mg content (1.11-1.28 mass{\%}) was raised to investigate the relationship between microstructures and tensile mechanical properties of Al-xZn-yMg aluminum alloys after friction stir process (FSP). The ZM35 alloy (Zn/Mg ratio is 3.5) and the ZM57 alloy (Zn/Mg ratio is 5.7) had a friction stir process and then three artificial aging treatments were performed to discuss the effects of Zn/Mg ratio on mechanical properties. After FSP and then natural aging for 12 days, the results of the experiment showed that the tensile strengths of ZM35 and ZM57 alloys were lower than the base metal (extruded material with T6, no FSP). Notably, the strength of as-FSP specimens was promoted after aging treatments. Through the mode I (80°C/16 h) treatments and the mode II (80°C/16 h + T6) treatment, the strengths of ZM35 alloy and ZM57 alloy were improved. However, after the mode III (T4 + 80°C/16 h + T6) treatment, the tensile strength and ductility of the ZM57 alloy reduced, and the deterioration rate of ductility reached to 65{\%}; the ZM35 alloy possessed a better ductility, which confirmed the fact that decreasing Zn/Mg ratio improved the workability of friction stir Al-Zn-Mg specimens with an artificial aging treatments.",
author = "Ku, {Ming Hsiang} and Fei-Yi Hung and Truan-Sheng Lui and Chen, {Li Hui} and Chiang, {Wen Ting}",
year = "2012",
month = "10",
day = "5",
doi = "10.2320/matertrans.M2012003",
language = "English",
volume = "53",
pages = "995--1001",
journal = "Materials Transactions",
issn = "0916-1821",
publisher = "Japan Institute of Metals (JIM)",
number = "5",

}

Microstructural effects of Zn/Mg ratio and post heat treatment on tensile properties of friction stirred process (FSP) Al-xZn-yMg alloys. / Ku, Ming Hsiang; Hung, Fei-Yi; Lui, Truan-Sheng; Chen, Li Hui; Chiang, Wen Ting.

In: Materials Transactions, Vol. 53, No. 5, 05.10.2012, p. 995-1001.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Microstructural effects of Zn/Mg ratio and post heat treatment on tensile properties of friction stirred process (FSP) Al-xZn-yMg alloys

AU - Ku, Ming Hsiang

AU - Hung, Fei-Yi

AU - Lui, Truan-Sheng

AU - Chen, Li Hui

AU - Chiang, Wen Ting

PY - 2012/10/5

Y1 - 2012/10/5

N2 - The workability and ductility of Al-Zn-Mg alloy are lower. In this study, the Zn content (4.44-6.34 mass%) was reduced and the Mg content (1.11-1.28 mass%) was raised to investigate the relationship between microstructures and tensile mechanical properties of Al-xZn-yMg aluminum alloys after friction stir process (FSP). The ZM35 alloy (Zn/Mg ratio is 3.5) and the ZM57 alloy (Zn/Mg ratio is 5.7) had a friction stir process and then three artificial aging treatments were performed to discuss the effects of Zn/Mg ratio on mechanical properties. After FSP and then natural aging for 12 days, the results of the experiment showed that the tensile strengths of ZM35 and ZM57 alloys were lower than the base metal (extruded material with T6, no FSP). Notably, the strength of as-FSP specimens was promoted after aging treatments. Through the mode I (80°C/16 h) treatments and the mode II (80°C/16 h + T6) treatment, the strengths of ZM35 alloy and ZM57 alloy were improved. However, after the mode III (T4 + 80°C/16 h + T6) treatment, the tensile strength and ductility of the ZM57 alloy reduced, and the deterioration rate of ductility reached to 65%; the ZM35 alloy possessed a better ductility, which confirmed the fact that decreasing Zn/Mg ratio improved the workability of friction stir Al-Zn-Mg specimens with an artificial aging treatments.

AB - The workability and ductility of Al-Zn-Mg alloy are lower. In this study, the Zn content (4.44-6.34 mass%) was reduced and the Mg content (1.11-1.28 mass%) was raised to investigate the relationship between microstructures and tensile mechanical properties of Al-xZn-yMg aluminum alloys after friction stir process (FSP). The ZM35 alloy (Zn/Mg ratio is 3.5) and the ZM57 alloy (Zn/Mg ratio is 5.7) had a friction stir process and then three artificial aging treatments were performed to discuss the effects of Zn/Mg ratio on mechanical properties. After FSP and then natural aging for 12 days, the results of the experiment showed that the tensile strengths of ZM35 and ZM57 alloys were lower than the base metal (extruded material with T6, no FSP). Notably, the strength of as-FSP specimens was promoted after aging treatments. Through the mode I (80°C/16 h) treatments and the mode II (80°C/16 h + T6) treatment, the strengths of ZM35 alloy and ZM57 alloy were improved. However, after the mode III (T4 + 80°C/16 h + T6) treatment, the tensile strength and ductility of the ZM57 alloy reduced, and the deterioration rate of ductility reached to 65%; the ZM35 alloy possessed a better ductility, which confirmed the fact that decreasing Zn/Mg ratio improved the workability of friction stir Al-Zn-Mg specimens with an artificial aging treatments.

UR - http://www.scopus.com/inward/record.url?scp=84866935425&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84866935425&partnerID=8YFLogxK

U2 - 10.2320/matertrans.M2012003

DO - 10.2320/matertrans.M2012003

M3 - Article

VL - 53

SP - 995

EP - 1001

JO - Materials Transactions

JF - Materials Transactions

SN - 0916-1821

IS - 5

ER -