1952年12月,NACA刘易斯飞行推进实验室的一名材料研究员检查了材料和应力建筑中的表面裂纹检测装置。材料研究是推进技术的一个重要方面。先进的发动机系统依赖于合金和后来的复合材料,这些材料坚固、重量轻、不受高温影响。喷气发动机在20世纪40年代末变得越来越流行,其产生的温度比活塞发动机高得多。这些高温使发动机部件,特别是涡轮受到压力。虽然刘易斯材料研究始于第二次世界大战,但材料和热力学部门直到1949年才成立。其主要实验室位于材料和应力建筑。该小组力求创造新的、改进的材料,并通过增加对材料的了解来改进发动机设计。20世纪50年代的刘易斯材料研究人员对镍铝合金、金属陶瓷刀片、金属基复合材料、氧化物弥散强化高温合金和通用斜坡作出了贡献。
Lewis Researcher in the Materials and Stresses Building
A materials researcher at the NACA’s Lewis Flight Propulsion Laboratory examines a surface crack detection apparatus in the Materials and Stresses Building during December 1952. Materials research was an important aspect of propulsion technology. Advanced engine systems relied upon alloys, and later composites, that were strong, lightweight, and impervious to high temperatures. Jet engines which became increasingly popular in the late 1940s, produced much higher temperatures than piston engines. These higher temperatures stressed engine components, particularly turbines. Although Lewis materials research began during World War II, the Materials and Thermodynamics Division was not created until 1949. Its primary laboratories were located in the Materials and Stresses Building. The group sought to create new, improved materials and to improve engine design through increased understanding of materials. The Lewis materials researchers of the 1950s made contributions to nickel-aluminum alloys, cermet blades, metal matrix composites, oxide dispersion strengthened superalloys, and universal slopes.

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