WETTING AND GRAIN BOUNDARY PENETRATION OF 42CRMO4 STEEL BY COPPER

Process like brazing and soldering are used in electronic packaging of integrated circuits, fabrication of heat exchangers for both commercial and aerospace applications. They are also used in manufacturing of high-performance sturdy equipment. Wetting plays a major role in these processes as it det...

Full description

Saved in:
Bibliographic Details
Published inHungarian materials and chemical sciences and engineering (Online) Vol. 45; no. 1; pp. 323 - 331
Main Authors Varanasi, Dheeraj, Baumli, Péter
Format Journal Article
LanguageEnglish
Published Miskolc University of Miskolc 01.01.2020
Subjects
Alloying
Chromium molybdenum steels
Commercial spacecraft
Contact angle
Cooling
Copper
Electronic packaging
Energy
Grain boundaries
Grooves
Heat exchangers
Integrated circuits
Low alloy steels
Penetration
Scanning electron microscopy
Sessile drop method
Steel
Wettability
Wetting
Online AccessGet full text

Cover

More Information
Summary:Process like brazing and soldering are used in electronic packaging of integrated circuits, fabrication of heat exchangers for both commercial and aerospace applications. They are also used in manufacturing of high-performance sturdy equipment. Wetting plays a major role in these processes as it determines the efficiency and efficacy of the joints. The present study is focussed on understanding the wettability of low alloyed steels like 42CrMo4 (1.2 w% Cr, 0.75 w% Mn, 0.3 w% Mo) by molten copper. The experiments were conducted at 1,100 °C under vacuum. The sessile drop technique is used and a good wetting is observed by copper on the surface of the steel. The wetting is almost spontaneous agreeing with the widely known phenomenon of excellent metal/metal wetting. Scanning Electron Microscopy (SEM-BSD) analysis showed excellent grain boundary wetting and corresponding groove formation at the steel/Cu interface. These grooves formed at the interface further leads to formation of copper channels which will result in grain boundary penetration of steel by copper.
ISSN:3004-0000
3004-0817