The influence of mg-based inclusions on the grain boundary mobility of austenite in ss400 steel

Chih Ting Lai, Hsuan Hao Lai, Yen Hao Frank Su, Fei Ya Huang, Chi Kang Lin, Jui-Chao Kuo, Hwa-Teng Lee

Research output: Contribution to journalArticle

Abstract

In this study, the effects of the addition of Mg to the grain growth of austenite and the magnesium-based inclusions to mobility were investigated in SS400 steel at high temperatures. A high-temperature confocal scanning laser microscope (HT-CSLM) was employed to directly observe, in situ, the grain structure of austenite under 25 torr Ar at high temperatures. The grain size distribution of austenite showed the log-normal distribution. The results of the grain growth curves using 3D surface fitting showed that the n and Q values of the growth equation parameters ranged from 0.2 to 0.26 and from 405 kJ/mole to 752 kJ/mole, respectively, when adding 5.6-22 ppm of Mg. Increasing the temperature from 1150 to 1250 ° C for 20 min and increasing the addition of Mg by 5.6, 11, and 22 ppm resulted in increases in the grain boundary velocity. The effects of solute drag and Zener pinning on grain boundary mobility were also calculated in this study.

Original languageEnglish
Article number370
JournalMetals
Volume9
Issue number3
DOIs
Publication statusPublished - 2019 Mar 1

Fingerprint

Steel
Austenite
Grain boundaries
Grain growth
Temperature
Crystal microstructure
Normal distribution
Magnesium
Drag
Microscopes
Scanning
Lasers

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Lai, Chih Ting ; Lai, Hsuan Hao ; Su, Yen Hao Frank ; Huang, Fei Ya ; Lin, Chi Kang ; Kuo, Jui-Chao ; Lee, Hwa-Teng. / The influence of mg-based inclusions on the grain boundary mobility of austenite in ss400 steel. In: Metals. 2019 ; Vol. 9, No. 3.
@article{4257e70bcbf34d6da4612b558176c982,
title = "The influence of mg-based inclusions on the grain boundary mobility of austenite in ss400 steel",
abstract = "In this study, the effects of the addition of Mg to the grain growth of austenite and the magnesium-based inclusions to mobility were investigated in SS400 steel at high temperatures. A high-temperature confocal scanning laser microscope (HT-CSLM) was employed to directly observe, in situ, the grain structure of austenite under 25 torr Ar at high temperatures. The grain size distribution of austenite showed the log-normal distribution. The results of the grain growth curves using 3D surface fitting showed that the n and Q values of the growth equation parameters ranged from 0.2 to 0.26 and from 405 kJ/mole to 752 kJ/mole, respectively, when adding 5.6-22 ppm of Mg. Increasing the temperature from 1150 to 1250 ° C for 20 min and increasing the addition of Mg by 5.6, 11, and 22 ppm resulted in increases in the grain boundary velocity. The effects of solute drag and Zener pinning on grain boundary mobility were also calculated in this study.",
author = "Lai, {Chih Ting} and Lai, {Hsuan Hao} and Su, {Yen Hao Frank} and Huang, {Fei Ya} and Lin, {Chi Kang} and Jui-Chao Kuo and Hwa-Teng Lee",
year = "2019",
month = "3",
day = "1",
doi = "10.3390/met9030370",
language = "English",
volume = "9",
journal = "Metals",
issn = "2075-4701",
publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",
number = "3",

}

The influence of mg-based inclusions on the grain boundary mobility of austenite in ss400 steel. / Lai, Chih Ting; Lai, Hsuan Hao; Su, Yen Hao Frank; Huang, Fei Ya; Lin, Chi Kang; Kuo, Jui-Chao; Lee, Hwa-Teng.

In: Metals, Vol. 9, No. 3, 370, 01.03.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The influence of mg-based inclusions on the grain boundary mobility of austenite in ss400 steel

AU - Lai, Chih Ting

AU - Lai, Hsuan Hao

AU - Su, Yen Hao Frank

AU - Huang, Fei Ya

AU - Lin, Chi Kang

AU - Kuo, Jui-Chao

AU - Lee, Hwa-Teng

PY - 2019/3/1

Y1 - 2019/3/1

N2 - In this study, the effects of the addition of Mg to the grain growth of austenite and the magnesium-based inclusions to mobility were investigated in SS400 steel at high temperatures. A high-temperature confocal scanning laser microscope (HT-CSLM) was employed to directly observe, in situ, the grain structure of austenite under 25 torr Ar at high temperatures. The grain size distribution of austenite showed the log-normal distribution. The results of the grain growth curves using 3D surface fitting showed that the n and Q values of the growth equation parameters ranged from 0.2 to 0.26 and from 405 kJ/mole to 752 kJ/mole, respectively, when adding 5.6-22 ppm of Mg. Increasing the temperature from 1150 to 1250 ° C for 20 min and increasing the addition of Mg by 5.6, 11, and 22 ppm resulted in increases in the grain boundary velocity. The effects of solute drag and Zener pinning on grain boundary mobility were also calculated in this study.

AB - In this study, the effects of the addition of Mg to the grain growth of austenite and the magnesium-based inclusions to mobility were investigated in SS400 steel at high temperatures. A high-temperature confocal scanning laser microscope (HT-CSLM) was employed to directly observe, in situ, the grain structure of austenite under 25 torr Ar at high temperatures. The grain size distribution of austenite showed the log-normal distribution. The results of the grain growth curves using 3D surface fitting showed that the n and Q values of the growth equation parameters ranged from 0.2 to 0.26 and from 405 kJ/mole to 752 kJ/mole, respectively, when adding 5.6-22 ppm of Mg. Increasing the temperature from 1150 to 1250 ° C for 20 min and increasing the addition of Mg by 5.6, 11, and 22 ppm resulted in increases in the grain boundary velocity. The effects of solute drag and Zener pinning on grain boundary mobility were also calculated in this study.

UR - http://www.scopus.com/inward/record.url?scp=85064178479&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064178479&partnerID=8YFLogxK

U2 - 10.3390/met9030370

DO - 10.3390/met9030370

M3 - Article

VL - 9

JO - Metals

JF - Metals

SN - 2075-4701

IS - 3

M1 - 370

ER -