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裂的过程可以分为疲劳源区,扩展区与瞬断区3部分. 图5 TC32钛合金双态组织的高周疲劳断口形貌 Fig. 5 SEM images of high cycle fatigue fracture surface of bimodal microstructure at a stress ratio of -1 in TC32 alloys 图6 TC32钛合金网篮组织的高周疲劳断口形貌 Fig. 6 SEM images of high cycle fatigue fracture surface of basket microstructure at stress ratio of 0.1 in TC32 alloys 图5(a)与图6(a)所示分别为双态组织与网篮组织的宏观断口形貌,观察发现,疲劳裂纹源均萌生于试样近表面,且为单一疲劳......
and fatigue S-N curve, etc. The results show that the characteristics of fatigue facture can be observed obviously under high cycle fatigue condition, and the higher the stress amplitude, the wider... area. Key words: 7B04-T7451 aluminum alloy; high cycle fatigue; fatigue crack growth rate; endurance limit ......
中图分类号:TF813 文献标志码:A Cycle leaching of low grade zinc oxide ores in Ida2--H2O system DOU Ai-chun1, YANG Tian-zu2, LIU Yun-jian1, SU Ming-ru1 (1. School of Material Science... by cycle leaching in Ida2--H2O system (iminodiacetate aqueous solution). The lixiviant solution was regenerated under a batch process containing the following stages of leaching, Zn precipitation......
of load, but the unevenness of each cylinder of the change rate of combustion cycle and the position of 50% combustion point are basically unchanged with the increase of load, and the unevenness of each...; intake supercharging; combustion unevenness; cycle change 对多缸发动机而言,各缸工作参数不均匀性是评价其综合性能的一个重要指标[1-3].由于进,排气压力波动和进排气系统结构不规则,过量空气系数(λ)闭环控制只能反映各缸过量空气系数的平均值以及各缸加工制造存在误差的影响,多缸发动机各缸进气量,气流强度,油气混合均匀度,缸内残余废气系数(RGF)等......
有较低的屈服强度. 关键词:A356合金；低周疲劳；循环硬化；疲劳寿命 中图分类号:TG146.2 文献标志码:A Low cycle fatigue behavior of cast A356 aluminum alloys SONG Mou-sheng, RAN Mao-wu, KONG Yuan-yuan, YAN Deng-yang (Department of Physics and Electronics Science, Tongren University, Tongren 554300, China) Abstract: Effects of the method of Ti-alloying and Ti contents on the low cycle fatigue (LCF) behavior......
of Ministry of Education (Kunming University of Science and Technology), Kunming 650093, China) Abstract: To intensify the heat transfer process in low-temperature heat driven ORC (organic Rankine cycle...; organic Rankine cycle 对于温度在300 ℃以下的低温余热,采用低沸点工质的有机朗肯循环(ORC)能获得比常规水蒸气朗肯循环高的发电效率[1-2].国内外众多研究者对有机朗肯循环工质选择的热力学进行了研究,有机工质R123具有极低的臭氧破坏潜值及全球变暖潜值,较好的稳定性和热物理性能,已被认为适合于ORC系统.因此,R123作为R11的替代工质已广泛用于工业及商业用离心式冷水机组中,国......
, which is roughly decomposed into four components as trend, cycle, impact and random. The core prices, consisting of the trend and the cycle, present regularities that a long-run cycle is embedded within two major cycles, and major cycle is composed of low-price period and high-price period, along with the rapid rise into a tower, and along with deep down into next trough; three sharply upward......
that the crack depth has a significant effect on chloride profiles beyond the crack tip. However, crack width, wet-dry cycle and initial saturation have little influence on the ingression of chloride ions in concrete and crack. Key words: chloride; cracked concrete; dual porous medium model; wet-dry cycle 在氯盐侵蚀环境中,干湿交替区域对应有害介质侵蚀最为严重的结构部位,是混凝土结构耐久性设计的关键[1-2],但是,国内外对此研究均是基于完好的混凝土结构进行的.而对于服役混凝土结构来说,各种原......
Effect of inclusion size on the high cycle fatigue strength and failure mode of a high V alloyed powder metallurgy tool steelJun Yao, Xuan-hui Qu, Xin-bo He, and Lin Zhang State Key Laboratory... strength of a high V alloyed powder metallurgy tool steel with two different inclusion size levels, tempered at different temperatures, was investigated by a series of high cycle fatigue tests......
Confining sulfur in sandwich structure of bamboo charcoal and aluminum fluoride(BC@S@AlF3) as a long cycle performance cathode for Li-S batteriesZhenya Luo1,2,Xiao Wang1,2,Weixin Lei1,2,Pengtao... or AlF3 coating.Moreover,the BC@S@AlF3 cathode presents excellent long-term capacity stability with a capacity decay of 0.073% per cycle during 500 charge/discharge cycles at 1 C,offering a potential......
