Resistance Spot Welding of Magnesium Alloy AZ91

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F15%3A00227456" target="_blank" >RIV/68407700:21220/15:00227456 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.mmscience.eu/content/file/MM%20SJ_201512.pdf" target="_blank" >http://www.mmscience.eu/content/file/MM%20SJ_201512.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Resistance Spot Welding of Magnesium Alloy AZ91

Popis výsledku v původním jazyce

Spot resistance welding (SRW) was used to weld Mg alloy AZ61A. To research weldability of this alloy many welding parameters, e.g. current, time, pressure, have been tried in wide range on the welding source DALEX PMS 11 – 4. Visual check was followed with metallography, tensile test etc. Some defects as solidification, liquation cracks, porosity were found. The creation of imperfections was found to be dependent on parameters, so finally optimized parameters were found. The best influence on weld integrity, i.e. weld w/o cracks, was to set cooling time directly after welding. For sheet metal of 1 mm optimum welding parameters were 8 kA, 100 ms, 9 kN and long cooling time. Another problem found, was limited lifetime of Cu electrodes, when in contact with Mg melt. This contamination damaged surface quality of electrodes, further influencing weld quality. High enough electrode pressure can diminish this problem.

Název v anglickém jazyce

Resistance Spot Welding of Magnesium Alloy AZ91

Popis výsledku anglicky

Spot resistance welding (SRW) was used to weld Mg alloy AZ61A. To research weldability of this alloy many welding parameters, e.g. current, time, pressure, have been tried in wide range on the welding source DALEX PMS 11 – 4. Visual check was followed with metallography, tensile test etc. Some defects as solidification, liquation cracks, porosity were found. The creation of imperfections was found to be dependent on parameters, so finally optimized parameters were found. The best influence on weld integrity, i.e. weld w/o cracks, was to set cooling time directly after welding. For sheet metal of 1 mm optimum welding parameters were 8 kA, 100 ms, 9 kN and long cooling time. Another problem found, was limited lifetime of Cu electrodes, when in contact with Mg melt. This contamination damaged surface quality of electrodes, further influencing weld quality. High enough electrode pressure can diminish this problem.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JR - Ostatní strojírenství

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

MM Science Journal

ISSN

1803-1269

e-ISSN

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Svazek periodika

2015

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

4

Strana od-do

596-599

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-84924559409