Fatigue Characteristics of Additively Manufactured Aerospace Materials

Lerch, Brad ; Ellis, David ; Locci, Ivan ; Draper, Susan ; Sudbrack, Chantal

关键词: FATIGUE TESTS;    ADDITIVE MANUFACTURING;    SPACECRAFT CONSTRUCTION MATERIALS;    HEAT RESISTANT ALLOYS;    NICKEL ALLOYS;    TITANIUM ALLOYS;    MECHANICAL PROPERTIES;    AEROSPACE ENGINEERING;    MICROSTRUCTURE;   

RP-ID  :  GRC-E-DAA-TN53084

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

This presentation documents the fatigue properties of three additive manufactured (AM) metallic systems (Ti-6-4, GRC op-84, and Alloy 718) used by NASA in various aerospace applications. These alloys were produced using the powder bed method, with the titanium alloy using an electron beam melting (EBM) and the other two alloys using selective laser melting systems (SLM). For each material a large matrix of fatigue tests were conducted and the fatigue characteristics compared to their conventionally manufactured counterparts. Build orientations and resulting microstructures are discussed with respect to the tested mechanical properties.