Etching technique for revealing work hardening regions in Mg-9Al-1Zn alloy

Mitsuhiro Okayasu, K. Sato, M. Mizuno

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A method for revealing the localised work hardened region (plastic deformation zone) in Mg-9Al-1Zn alloy (AZ91) has been developed using a new etching technique. With this technique, etching with the solution (9 g picric acid, 30 mL acetic acid, 150 mL ethyl alcohol and 20 mL H 2O) was executed on the samples after plastic deformation and then heating to 300°C for 3 h. Because of the high strain energy in the plastic deformation zone, the microstructural characteristic in the deformation zone changed substantially after the heating process, where severe precipitation of Mg 17Al 12 phase occurred in the Mg rich α phase. With the change of microstructural characteristics, the deformation region can be revealed. The plastic zone was revealed by the different degrees of etching response in the deformation and undeformed regions; the plastic zone was slightly etched, whereas the other region was deeply etched. From the different surface height level, the deformation zone was found to be observable even at low magnification.

Original languageEnglish
Pages (from-to)76-80
Number of pages5
JournalMaterials Science and Technology
Volume27
Issue number1
DOIs
Publication statusPublished - Jan 2011
Externally publishedYes

Fingerprint

work hardening
Strain hardening
Etching
etching
plastic deformation
Plastic deformation
plastics
Plastics
heating
Industrial heating
Strain energy
magnification
acetic acid
Acetic acid
Acetic Acid
Ethanol
ethyl alcohol
Heating
acids
Acids

Keywords

  • Etching technique
  • Magnesium alloy
  • Microstructural morphology
  • Plastic deformation
  • Precipitation

ASJC Scopus subject areas

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

Cite this

Etching technique for revealing work hardening regions in Mg-9Al-1Zn alloy. / Okayasu, Mitsuhiro; Sato, K.; Mizuno, M.

In: Materials Science and Technology, Vol. 27, No. 1, 01.2011, p. 76-80.

Research output: Contribution to journalArticle

@article{0a8120a9572449dfb8b29806b5ec23cc,
title = "Etching technique for revealing work hardening regions in Mg-9Al-1Zn alloy",
abstract = "A method for revealing the localised work hardened region (plastic deformation zone) in Mg-9Al-1Zn alloy (AZ91) has been developed using a new etching technique. With this technique, etching with the solution (9 g picric acid, 30 mL acetic acid, 150 mL ethyl alcohol and 20 mL H 2O) was executed on the samples after plastic deformation and then heating to 300°C for 3 h. Because of the high strain energy in the plastic deformation zone, the microstructural characteristic in the deformation zone changed substantially after the heating process, where severe precipitation of Mg 17Al 12 phase occurred in the Mg rich α phase. With the change of microstructural characteristics, the deformation region can be revealed. The plastic zone was revealed by the different degrees of etching response in the deformation and undeformed regions; the plastic zone was slightly etched, whereas the other region was deeply etched. From the different surface height level, the deformation zone was found to be observable even at low magnification.",
keywords = "Etching technique, Magnesium alloy, Microstructural morphology, Plastic deformation, Precipitation",
author = "Mitsuhiro Okayasu and K. Sato and M. Mizuno",
year = "2011",
month = "1",
doi = "10.1179/174328409X425245",
language = "English",
volume = "27",
pages = "76--80",
journal = "Materials Science and Technology",
issn = "0267-0836",
publisher = "Maney Publishing",
number = "1",

}

TY - JOUR

T1 - Etching technique for revealing work hardening regions in Mg-9Al-1Zn alloy

AU - Okayasu, Mitsuhiro

AU - Sato, K.

AU - Mizuno, M.

PY - 2011/1

Y1 - 2011/1

N2 - A method for revealing the localised work hardened region (plastic deformation zone) in Mg-9Al-1Zn alloy (AZ91) has been developed using a new etching technique. With this technique, etching with the solution (9 g picric acid, 30 mL acetic acid, 150 mL ethyl alcohol and 20 mL H 2O) was executed on the samples after plastic deformation and then heating to 300°C for 3 h. Because of the high strain energy in the plastic deformation zone, the microstructural characteristic in the deformation zone changed substantially after the heating process, where severe precipitation of Mg 17Al 12 phase occurred in the Mg rich α phase. With the change of microstructural characteristics, the deformation region can be revealed. The plastic zone was revealed by the different degrees of etching response in the deformation and undeformed regions; the plastic zone was slightly etched, whereas the other region was deeply etched. From the different surface height level, the deformation zone was found to be observable even at low magnification.

AB - A method for revealing the localised work hardened region (plastic deformation zone) in Mg-9Al-1Zn alloy (AZ91) has been developed using a new etching technique. With this technique, etching with the solution (9 g picric acid, 30 mL acetic acid, 150 mL ethyl alcohol and 20 mL H 2O) was executed on the samples after plastic deformation and then heating to 300°C for 3 h. Because of the high strain energy in the plastic deformation zone, the microstructural characteristic in the deformation zone changed substantially after the heating process, where severe precipitation of Mg 17Al 12 phase occurred in the Mg rich α phase. With the change of microstructural characteristics, the deformation region can be revealed. The plastic zone was revealed by the different degrees of etching response in the deformation and undeformed regions; the plastic zone was slightly etched, whereas the other region was deeply etched. From the different surface height level, the deformation zone was found to be observable even at low magnification.

KW - Etching technique

KW - Magnesium alloy

KW - Microstructural morphology

KW - Plastic deformation

KW - Precipitation

UR - http://www.scopus.com/inward/record.url?scp=78650816420&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78650816420&partnerID=8YFLogxK

U2 - 10.1179/174328409X425245

DO - 10.1179/174328409X425245

M3 - Article

AN - SCOPUS:78650816420

VL - 27

SP - 76

EP - 80

JO - Materials Science and Technology

JF - Materials Science and Technology

SN - 0267-0836

IS - 1

ER -