Showing papers by "Robert F. Singer published in 2019"
TL;DR: In this paper, the influence of α-phase and β-phase (Mg17Al12) on corrosion of cast binary Mg-Al alloys was investigated by immersion testing in 5'wt.-% NaCl solution saturated with Mg(OH)2 and by measuring the corrosion potential.
50 citations
01 Jan 2019
TL;DR: In this article, the authors give an overview on the current development status for metal injection molding of nickel-base superalloys, and discuss potential new fields of applications for MIM.
Abstract: Although the number of commercial applications is still limited, the activities in the field of metal injection molding (MIM) of nickel-base superalloys have been steadily increasing during the last decade. The aerospace industry provides the main driving force behind this development. MIM seems attractive as it offers a high potential in cost reduction. This chapter gives an overview on the current development status for MIM of nickel-base superalloys. Important factors for MIM processing with regard to debinding and sintering as well as achievable properties are summarized. Potential new fields of applications for metal injection molded nickel-base superalloys are discussed.
12 citations
7 citations
1 citations
TL;DR: In this article, the oxidation behavior of superalloy IN 713 fabricated by metal injection molding (MIM) was investigated and compared with standard cast material plus hot isostatic pressing (Cast + HIP).
Abstract: The oxidation behavior of superalloy IN 713 fabricated by metal injection molding (MIM) was investigated and compared with standard cast material plus hot isostatic pressing (Cast + HIP). The carbon content of MIM alloys varied in the experiments due to the use of different starting powders. At all temperatures and times investigated, weight gain increased strongly with carbon content. Carbon in the alloys was present mainly in the form of carbides. Carbides react with oxygen during oxide scale formation. Microscopy showed that selective oxidation of carbides led to the formation of protrusions and cracks in the oxide layer. In this way, the protective effect of the oxide scale was weakened.
1 citations
Patent•
18 Sep 2019
Patent•
19 Sep 2019
TL;DR: In this article, a verfahren zur thermischen behandlung eines MIM-Bauteils with einer Nickel-basis-legierung is found.
Abstract: Die Erfindung betrifft ein Verfahren zur thermischen Behandlung eines Metallpulverspritzguss-Bauteils (MIM-Bauteil) mit einer Nickel-Basis-Legierung, wobei das Bauteil nach dem Sintern des Spritzgussprozesses fur eine vorbestimmte Haltezeit mindestens einer Behandlungstemperatur unterhalb der Sintertemperatur ausgesetzt wird. Die Erfindung betrifft auch ein MIM-Bauteil und ein Flugzeugtriebwerk.