Liquid-metal-induced embrittlement of Zn-coated hot stamping steel

Chang Wook Lee; Dong Wei Fan; Il Ryoung Sohn; Seok Jae Lee; Bruno C. De Cooman

doi:10.1007/s11661-012-1316-0

Liquid-metal-induced embrittlement of Zn-coated hot stamping steel

Chang Wook Lee^*
, Dong Wei Fan
, Il Ryoung Sohn
, Seok Jae Lee
, Bruno C. De Cooman

^*Corresponding author for this work

Metallurgical System Engineering

Pohang University of Science and Technology
POSCO

Research output: Contribution to journal › Journal article › peer-review

143 Scopus citations

Abstract

Liquid-metal-induced embrittlement (LMIE) of galvanized hot stamping steel occurs due to the simultaneous application of stress and the presence of a liquid Zn surface layer during the hot stamping process. The mechanism specific to the liquid metal induced embrittlement occurring during hot stamping was investigated in detail. It was found that when a tensile stress was applied, liquid Zn could penetrate along grain boundaries in the steel matrix at temperatures above the Liquid + α-Fe (Zn) → Γ₁ peritectic transformation temperature of 1055 K (782 °C). The results show that an increase of the annealing time prior to hot stamping is an effective way to prevent LMIE by the elimination of the liquid phase.

Original language	English
Pages (from-to)	5122-5127
Number of pages	6
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume	43
Issue number	13
DOIs	https://doi.org/10.1007/s11661-012-1316-0
State	Published - 2012.12

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title = "Liquid-metal-induced embrittlement of Zn-coated hot stamping steel",

abstract = "Liquid-metal-induced embrittlement (LMIE) of galvanized hot stamping steel occurs due to the simultaneous application of stress and the presence of a liquid Zn surface layer during the hot stamping process. The mechanism specific to the liquid metal induced embrittlement occurring during hot stamping was investigated in detail. It was found that when a tensile stress was applied, liquid Zn could penetrate along grain boundaries in the steel matrix at temperatures above the Liquid + α-Fe (Zn) → Γ1 peritectic transformation temperature of 1055 K (782 °C). The results show that an increase of the annealing time prior to hot stamping is an effective way to prevent LMIE by the elimination of the liquid phase.",

author = "Lee, \{Chang Wook\} and Fan, \{Dong Wei\} and Sohn, \{Il Ryoung\} and Lee, \{Seok Jae\} and \{De Cooman\}, \{Bruno C.\}",

year = "2012",

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doi = "10.1007/s11661-012-1316-0",

language = "English",

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T1 - Liquid-metal-induced embrittlement of Zn-coated hot stamping steel

AU - Lee, Chang Wook

AU - Fan, Dong Wei

AU - Sohn, Il Ryoung

AU - Lee, Seok Jae

AU - De Cooman, Bruno C.

PY - 2012/12

Y1 - 2012/12

N2 - Liquid-metal-induced embrittlement (LMIE) of galvanized hot stamping steel occurs due to the simultaneous application of stress and the presence of a liquid Zn surface layer during the hot stamping process. The mechanism specific to the liquid metal induced embrittlement occurring during hot stamping was investigated in detail. It was found that when a tensile stress was applied, liquid Zn could penetrate along grain boundaries in the steel matrix at temperatures above the Liquid + α-Fe (Zn) → Γ1 peritectic transformation temperature of 1055 K (782 °C). The results show that an increase of the annealing time prior to hot stamping is an effective way to prevent LMIE by the elimination of the liquid phase.

AB - Liquid-metal-induced embrittlement (LMIE) of galvanized hot stamping steel occurs due to the simultaneous application of stress and the presence of a liquid Zn surface layer during the hot stamping process. The mechanism specific to the liquid metal induced embrittlement occurring during hot stamping was investigated in detail. It was found that when a tensile stress was applied, liquid Zn could penetrate along grain boundaries in the steel matrix at temperatures above the Liquid + α-Fe (Zn) → Γ1 peritectic transformation temperature of 1055 K (782 °C). The results show that an increase of the annealing time prior to hot stamping is an effective way to prevent LMIE by the elimination of the liquid phase.

UR - https://www.scopus.com/pages/publications/84870424261

U2 - 10.1007/s11661-012-1316-0

DO - 10.1007/s11661-012-1316-0

M3 - Journal article

AN - SCOPUS:84870424261

SN - 1073-5623

VL - 43

SP - 5122

EP - 5127

JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

IS - 13

ER -

Liquid-metal-induced embrittlement of Zn-coated hot stamping steel

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