Effect of twinning on the mechanical behavior in Mg-Zn-Y alloys

Ju Youn Lee, Hyun Kyu Lim, Do Hyung Kim, Won Tae Kim, Do Hyang Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the present work, the effect of twinning on the mechanical behavior of Mg-Zn-Y alloys has been investigated by controlling the process condition and modifying the matrix. In order to study the effect of the deformation speed, we examined as-rolled Mg-6Zn-1.2Y by changing rolling speeds (32-64 mm/s). Dynamically recrystallized grain structure was developed under a lower rolling speed of 32 mm/s, while significantly twinned grain structure was obtained under a higher rolling speed of 64 mm/s. From the results of tensile test, uniform elongation increases from 5.3% to 7.3% with increasing rolling speeds. In order to study the effect of mechanical twinning on the mechanical behavior, we examined Mg-xZn-0.6Y alloys (x = 3-7). Mg-xZn-0.6Y alloys are consisted of α-Mg and icosahedral phase (I-phase) particles up to 7 wt% Zn. From the result of tensile test, the strength and elongation increase simultaneously with increasing zinc content in spit of similar grain size and similar volume fraction of I-phase particles. Detailed study by an interrupted tensile test shows that the volume fraction of twins in interrupted Mg-7Zn-0.6Y is higher than that in Mg-3Zn-0.6Y. Texture analysis shows that the type of twinning is (10-12) extension type twin. Therefore, it can be suggested that twinning leads to enhance strain hardening and reorient basal slip to more favorable orientations, improving the elongation in wrought Mg-Zn-Y alloys.

Original languageEnglish
Title of host publicationMagnesium Technology 2008
Pages253-255
Number of pages3
Publication statusPublished - 2008 Jun 30
EventMagnesium Technology 2008 - New Orleans, LA, United States
Duration: 2008 Mar 92008 Mar 13

Publication series

NameMagnesium Technology
ISSN (Print)1545-4150

Other

OtherMagnesium Technology 2008
CountryUnited States
CityNew Orleans, LA
Period08/3/908/3/13

Fingerprint

Twinning
Elongation
Crystal microstructure
Volume fraction
Strain hardening
Zinc
Textures

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Lee, J. Y., Lim, H. K., Kim, D. H., Kim, W. T., & Kim, D. H. (2008). Effect of twinning on the mechanical behavior in Mg-Zn-Y alloys. In Magnesium Technology 2008 (pp. 253-255). (Magnesium Technology).
Lee, Ju Youn ; Lim, Hyun Kyu ; Kim, Do Hyung ; Kim, Won Tae ; Kim, Do Hyang. / Effect of twinning on the mechanical behavior in Mg-Zn-Y alloys. Magnesium Technology 2008. 2008. pp. 253-255 (Magnesium Technology).
@inproceedings{9226c51350514466a9cb8a6fd94f4c24,
title = "Effect of twinning on the mechanical behavior in Mg-Zn-Y alloys",
abstract = "In the present work, the effect of twinning on the mechanical behavior of Mg-Zn-Y alloys has been investigated by controlling the process condition and modifying the matrix. In order to study the effect of the deformation speed, we examined as-rolled Mg-6Zn-1.2Y by changing rolling speeds (32-64 mm/s). Dynamically recrystallized grain structure was developed under a lower rolling speed of 32 mm/s, while significantly twinned grain structure was obtained under a higher rolling speed of 64 mm/s. From the results of tensile test, uniform elongation increases from 5.3{\%} to 7.3{\%} with increasing rolling speeds. In order to study the effect of mechanical twinning on the mechanical behavior, we examined Mg-xZn-0.6Y alloys (x = 3-7). Mg-xZn-0.6Y alloys are consisted of α-Mg and icosahedral phase (I-phase) particles up to 7 wt{\%} Zn. From the result of tensile test, the strength and elongation increase simultaneously with increasing zinc content in spit of similar grain size and similar volume fraction of I-phase particles. Detailed study by an interrupted tensile test shows that the volume fraction of twins in interrupted Mg-7Zn-0.6Y is higher than that in Mg-3Zn-0.6Y. Texture analysis shows that the type of twinning is (10-12) extension type twin. Therefore, it can be suggested that twinning leads to enhance strain hardening and reorient basal slip to more favorable orientations, improving the elongation in wrought Mg-Zn-Y alloys.",
author = "Lee, {Ju Youn} and Lim, {Hyun Kyu} and Kim, {Do Hyung} and Kim, {Won Tae} and Kim, {Do Hyang}",
year = "2008",
month = "6",
day = "30",
language = "English",
isbn = "9780873397117",
series = "Magnesium Technology",
pages = "253--255",
booktitle = "Magnesium Technology 2008",

}

Lee, JY, Lim, HK, Kim, DH, Kim, WT & Kim, DH 2008, Effect of twinning on the mechanical behavior in Mg-Zn-Y alloys. in Magnesium Technology 2008. Magnesium Technology, pp. 253-255, Magnesium Technology 2008, New Orleans, LA, United States, 08/3/9.

Effect of twinning on the mechanical behavior in Mg-Zn-Y alloys. / Lee, Ju Youn; Lim, Hyun Kyu; Kim, Do Hyung; Kim, Won Tae; Kim, Do Hyang.

Magnesium Technology 2008. 2008. p. 253-255 (Magnesium Technology).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Effect of twinning on the mechanical behavior in Mg-Zn-Y alloys

AU - Lee, Ju Youn

AU - Lim, Hyun Kyu

AU - Kim, Do Hyung

AU - Kim, Won Tae

AU - Kim, Do Hyang

PY - 2008/6/30

Y1 - 2008/6/30

N2 - In the present work, the effect of twinning on the mechanical behavior of Mg-Zn-Y alloys has been investigated by controlling the process condition and modifying the matrix. In order to study the effect of the deformation speed, we examined as-rolled Mg-6Zn-1.2Y by changing rolling speeds (32-64 mm/s). Dynamically recrystallized grain structure was developed under a lower rolling speed of 32 mm/s, while significantly twinned grain structure was obtained under a higher rolling speed of 64 mm/s. From the results of tensile test, uniform elongation increases from 5.3% to 7.3% with increasing rolling speeds. In order to study the effect of mechanical twinning on the mechanical behavior, we examined Mg-xZn-0.6Y alloys (x = 3-7). Mg-xZn-0.6Y alloys are consisted of α-Mg and icosahedral phase (I-phase) particles up to 7 wt% Zn. From the result of tensile test, the strength and elongation increase simultaneously with increasing zinc content in spit of similar grain size and similar volume fraction of I-phase particles. Detailed study by an interrupted tensile test shows that the volume fraction of twins in interrupted Mg-7Zn-0.6Y is higher than that in Mg-3Zn-0.6Y. Texture analysis shows that the type of twinning is (10-12) extension type twin. Therefore, it can be suggested that twinning leads to enhance strain hardening and reorient basal slip to more favorable orientations, improving the elongation in wrought Mg-Zn-Y alloys.

AB - In the present work, the effect of twinning on the mechanical behavior of Mg-Zn-Y alloys has been investigated by controlling the process condition and modifying the matrix. In order to study the effect of the deformation speed, we examined as-rolled Mg-6Zn-1.2Y by changing rolling speeds (32-64 mm/s). Dynamically recrystallized grain structure was developed under a lower rolling speed of 32 mm/s, while significantly twinned grain structure was obtained under a higher rolling speed of 64 mm/s. From the results of tensile test, uniform elongation increases from 5.3% to 7.3% with increasing rolling speeds. In order to study the effect of mechanical twinning on the mechanical behavior, we examined Mg-xZn-0.6Y alloys (x = 3-7). Mg-xZn-0.6Y alloys are consisted of α-Mg and icosahedral phase (I-phase) particles up to 7 wt% Zn. From the result of tensile test, the strength and elongation increase simultaneously with increasing zinc content in spit of similar grain size and similar volume fraction of I-phase particles. Detailed study by an interrupted tensile test shows that the volume fraction of twins in interrupted Mg-7Zn-0.6Y is higher than that in Mg-3Zn-0.6Y. Texture analysis shows that the type of twinning is (10-12) extension type twin. Therefore, it can be suggested that twinning leads to enhance strain hardening and reorient basal slip to more favorable orientations, improving the elongation in wrought Mg-Zn-Y alloys.

UR - http://www.scopus.com/inward/record.url?scp=45749087756&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=45749087756&partnerID=8YFLogxK

M3 - Conference contribution

SN - 9780873397117

T3 - Magnesium Technology

SP - 253

EP - 255

BT - Magnesium Technology 2008

ER -

Lee JY, Lim HK, Kim DH, Kim WT, Kim DH. Effect of twinning on the mechanical behavior in Mg-Zn-Y alloys. In Magnesium Technology 2008. 2008. p. 253-255. (Magnesium Technology).