Crack Path and Liquid Metal Embrittlement Specificity of Austenitic Steels in Mercury at Room Temperature

2021 ◽  
Author(s):  
Thierry Auger ◽  
Bassem Barkia ◽  
Eva Héripré ◽  
Vincent Michel ◽  
Denis Mutel ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Room Temperature ◽  
Crack Path ◽  
Liquid Metal Embrittlement ◽  
Austenitic Steels

Atomic-scale Investigation of Liquid-Metal-Embrittlement Crack-path: Revealing Mechanism and Role of Grain Boundary Chemistry

2021 ◽  
Vol 204 ◽  
pp. 116519
Author(s):  
M.H. Razmpoosh ◽  
B. Langelier ◽  
E. Marzbanrad ◽  
H.S. Zurob ◽  
N. Zhou ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Grain Boundary ◽  
Crack Path ◽  
Liquid Metal Embrittlement ◽  
Atomic Scale ◽  
Boundary Chemistry

scholarly journals Effect of the Small Punch Test sample geometry on the Liquid Metal Embrittlement of Cu-30 wt% Zn by the eGaIn

2021 ◽  
Vol 349 ◽  
pp. 02014
Author(s):  
Marco Ezequiel ◽  
Ingrid Proriol Serre
Keyword(s):  
Liquid Metal ◽  
Room Temperature ◽  
High Strain ◽  
Test Sample ◽  
Liquid Metal Embrittlement ◽  
Small Punch Test ◽  
Notched Specimen ◽  
Small Punch ◽  
Punch Test ◽  
Solid Liquid

Liquid metal embrittlement (LME) is the embrittlement or the modification of the fracture behaviour of a metal or alloy when it undergoes plastic deformation while in contact with a liquid metal or liquid alloy. LME occurrence depends strongly on the properties of the metals involved and on the conditions of the mechanical stresses applied to the solid. The Small Punch Test (SPT) on flat specimens is very sensitive to identify the conditions of LME occurrence. Moreover, there are alternative SPT notched specimen geometries that have the potential to screen solid/liquid couples for sensibility to LME in different conditions. To study the apparition of the LME on an alpha brass with 30 wt% Zn in contact with the eGaIn (Ga-In eutectic), SPT at room temperature were carried out at different displacement rates and using three specimen types: the standard flat geometry and two notched geometries. While the flat specimens did not present LME, the presence of a notch and a high strain rate induced LME on the other specimen geometries. For these last specimens, the eGaIn modifies the SPT load-displacement curves at the crack propagation stage and changes the fracture to a partially ductile fracture followed by a brittle fracture.

scholarly journals Crack path in liquid metal embrittlement: experiments with steels and modeling

2015 ◽  
Vol 10 (35) ◽  
pp. 250-259
Author(s):  
T. Auger ◽  
S. Hémery ◽  
M. Bourcier ◽  
C. Berdin ◽  
M. Martin ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Crack Path ◽  
Liquid Metal Embrittlement

Crystallographic study of liquid-metal-embrittlement crack path

2020 ◽  
Vol 267 ◽  
pp. 127511 ◽  
Author(s):  
M.H. Razmpoosh ◽  
A. Macwan ◽  
F. Goodwin ◽  
E. Biro ◽  
Y. Zhou
Keyword(s):  
Liquid Metal ◽  
Crack Path ◽  
Liquid Metal Embrittlement ◽  
Crystallographic Study

scholarly journals Significance of cutting plane in liquid metal embrittlement severity quantification

2021 ◽  
Vol 3 (6) ◽  
Author(s):  
C. DiGiovanni ◽  
L. He ◽  
C. Hawkins ◽  
N. Y. Zhou ◽  
E. Biro
Keyword(s):  
Liquid Metal ◽  
Cross Section ◽  
Standard Procedure ◽  
Fuel Efficiency ◽  
Zinc Coating ◽  
High Strength Steels ◽  
Absolute Measurement ◽  
Cutting Plane ◽  
Liquid Metal Embrittlement ◽  
Welding Parameters

AbstractThe automotive industry is turning to advanced high strength steels (AHSS) to reduce vehicle weight and increase fuel efficiency. However, the zinc coating on AHSS can cause liquid metal embrittlement (LME) cracking during resistance spot welding. To understand the problem, the severity of the cracking must be measured. Typically, this is done from the weld cross-section. Currently, there is no standard procedure to determine which plane through the weld must be examined to gauge cracking severity, leading to a variety of practices for choosing a cutting plane. This work compares the magnitude and variability of LME severity measured from the plane of exhibiting the most severe surface cracking to arbitrarily chosen planes. The plane exhibiting the most severe cracks had more and longer cracks on the cross-section than the arbitrarily chosen plane, resulting in a higher crack severity measurement. This higher absolute measurement increased the relative accuracy of the examination, allowing for fewer welds to be examined to precisely determine the effect of LME mitigation methods on cracking severity, how welding parameters affect LME cracking severity and the predicted LME affected strength of a particular weld.

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