Influence of Heat Treatments on Heat Affected Zone Cracking of Gas Tungsten Arc Welded Additive Manufactured Alloy 718

Raza, Tahira,1972-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW (författare)

The weldability of additive manufactured Alloy 718 was investigated in various heat-treated conditions. The microstructure of the base metal was examined in detail in order to understand the effect of different pre-weld heat treatments; i.e., solution, solution and aging, and hot isostatic pressing. After welding, the variation in total crack lengths, maximum crack length and the total number of cracks in the heat affected zone (HAZ) were used as criteria for the cracking susceptibility of each material condition where wrought Alloy 718 was used as the reference material. Selective laser melting (SLM) manufactured Alloy 718 was susceptible to HAZ cracking in all material conditions. Total crack lengths in HAZ were highest in the SLM as-built condition and lowest in the SLM hot isostatic pressed condition. The cracks that were found in the HAZ of the welded materials consisted of liquation cracks, with eutectic product surrounding the cracks, as well as cracks from which liquation products were absent.

TEKNIK OCH TEKNOLOGIER Materialteknik Bearbetnings-, yt- och fogningsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Materials Engineering Manufacturing, Surface and Joining Technology hsv//eng
selective laser melting; Alloy 718; heat treatments; gas tungsten arc welding; heat affected zone cracking
Manufacturing and materials engineering
Produktions- och materialteknik
Production Technology
Produktionsteknik

Hurtig, Kjell,1960-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW(Swepub:hv)tkh (författare)
Asala, GbengaUniversity of Manitoba, Department of Mechanical Engineering, Winnipeg, MB R3T 5V6, Canada (författare)
Andersson, Joel,1981-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW(Swepub:hv)joan0056 (författare)
Svensson, Lars-Erik,1951-Högskolan Väst,Avdelningen för svetsteknologi (SV),PTW(Swepub:hv)larsve (författare)
Ojo, Olanrewaju AkanbiUniversity of Manitoba, Department of Mechanical Engineering, Winnipeg, MB R3T 5V6, Canada (författare)
Högskolan VästAvdelningen för svetsteknologi (SV) (creator_code:org_t)

Av författaren/redakt...: Raza, Tahira, 19 ...; Hurtig, Kjell, 1 ...; Asala, Gbenga; Andersson, Joel, ...; Svensson, Lars-E ...; Ojo, Olanrewaju ...

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TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Bearbetnings yt ...

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