简介:
简介:IncurrentInternationalThermonuclearExperimentalReactor(ITER)design,the316LNausteniticstainlesssteel(316LNSS)isusedforfirst-wall/blanketstructures.Thus,itisnecessarytostudythefundamentalmechanicalpropertiesandirradiationeffectof316LNSS.ArandomsolidsolutionmodelofFe-Cr-Ni-Mn-Mo-Sialloyisusedfordescribing316LNSS.Usingfirst-principlesapproaches,theelasticconstantsandidealstrengthofthealloywerecalculated.SuchalloyexhibitsgoodductilebehavioraccordingtothetheoreticalvaluesofCauchypressureandratioofbulkmodulusandshearmodulus.Withinthe256-atomsupercell,inclusionofsinglevacancydefectfurtherenhancestheductilityofthealloy,andtheexistenceofinterstitial(Fe,H,He)atomsenhancestheYoungsmodulus.
简介:在密度以内的第一原则的计算功能的理论被执行了在Ti32阶段>艾尔基于合金,Zr,Hf,和Sn(6.25at%)元素做了。格子常数,全部的精力和有弹性的常数为supercells被计算。形成热含量,体积模量,砍模量,幼仔模量,和内在的坚硬被调查。做的2阶段的韧性被Cauchy压力,G/B和泊松比率分析。结果证明由由Sn的艾尔(2n)的Zr,Hf,和替换的Ti(6h)的替换能使做的2阶段更稳定。2阶段的刚性和坚硬能被与Zr和Hf做提高,当Sn带相反的效果时。Sn是更强大的比Hf改进做的2阶段的韧性,但是Zr能增加易碎物。状态(DOS和PDOS)的密度和差别费用密度被获得揭示alloying元素的效果的内在的机制。