Specific Response of Additively Manufactured AlSi9Cu3Fe Alloy to Precipitation Strengthening

Michaela Roudnická; Orsolya Molnárová; Drahomír Dvorský; Leoš Křivský; Dalibor Vojtěch

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자료유형: 학술저널

저자정보: Michaela Roudnická (University of Chemistry and Technology Prague) Orsolya Molnárová (Academy of Sciences of the Czech Republic (ASCR)) Drahomír Dvorský (University of Chemistry and Technology Prague) Leoš Křivský (University of Chemistry and Technology Prague) Dalibor Vojtěch (University of Chemistry and Technology Prague)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.26 No.8

발행연도: 2020.1

수록면: 1,168 - 1,181 (14page)

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The additive manufacturing of Al–Si–Cu/Mg alloys along with their precipitation strengthening represents a promising optionof producing high-strength complex-shaped light-weight components for special applications in automotive or aerospace. Inthis paper, we follow our previous research on AlSi9Cu3Fe alloy prepared by one of the additive manufacturing technologies,selective laser melting (SLM). We characterize the precipitation strengthening of this material during conventional T6heat treatment, and also present the possibility of its precipitation strengthening by annealing at temperatures of 413–453 Kwithout previous solutionizing. We revealed the specific response of the studied material consisting in the simultaneousprecipitation of semi-coherent θ′ precipitates and Si platelets. By characterization of hardness, mechanical performance undertensile loading and microstructure, we demonstrate that the AlSi9Cu3Fe alloy is not stable when prepared by SLM and itsstability can be induced by additional heat treatment. The results of our work thus yield with a practical recommendationfor applications where temperature increase may occur.

#Aluminium alloys · AlSi9Cu3Fe · Additive manufacturing · Selective laser melting · Heat treatment

참고문헌 (48)

참고문헌 신청

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