简介:Lowercontentofcarboncanfurtherimprovethestressrupturelifeofp-modifiedDA718alloyuptomorethan270%.Meanwhile,theductilityofthealloydecreasedalittle.Moreboronatomsdissociateduetodecreasingcarboncontentandinteractwithphosphoruswhichbringsthelongerstressrupturelifeofthealloy.Lesscarbonmayinducemorephosphorussegregatinginthegrainboundaryandresultinbrittleness.
简介:摘要:本文所描述的是空气循环-座舱冷却(RACC)系统。空调是DA42NG飞机的选装组件,飞行学院DA42NG飞机均选装空调。空调(RACC)系统是飞机的一个独立子系统,由电力驱动。它主要由中央装置(安装在后部行李舱)和一个控制面板(在座舱左侧壁)组成。