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:AerMet100钢; 强化相; M2C; Laves相; TEM观察; AerMet100; strengthening precipitate; M2C; Laves phase; TEM; [全文内容正在添加中] ......
solution strengthening; dispersion strengthening 镁合金因其密度小,比强度和比刚度高,减震和降噪性能好,尺寸稳定等优点备受汽车工业与航空工业的青睐[1].但镁合金的耐磨耐蚀性较差,从而限制了它的广泛应用.通过添加合金元素可以提高镁合金的耐磨耐蚀性,但会导致合金元素的偏析,或者生成脆性的金属间化合物相.因此,为了满足实际应用的需求,可以只改变镁合... Press, 2003: 34-39. [20] 陈菊芳, 张永康, 李仁兴, 秦海永. AM50A 镁合金激光表面重熔层的强化效果与机理[J]. 中国有色金属学报, 2008, 18(8): 1426-1431.CHEN Ju-fang, ZHANG Yong-kang, LI Ren-xing, QIN Hai-yong. Strengthening effect and mechanism......
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at 470 °C for 4 h. Due to the strengthening effect of GP zones, for alloys treated by under-aging process, the increase of aging time and aging temperature improved the ultimate tensile strength (UTS... the design requirements of automobile components. Key words: Al-Zn-Mg-Cu alloy; squeeze casting; under-aging treatment; GP zone; precipitation strengthening 1 Introduction In recent years......
promotes the precipitation of T1 phase, thus improves ageing strengthening. Mg addition promotes the precipitation of GP zone and θ′ phase while Zn facilitates T1 phase precipitation. The addition of Mg... strengthening 与传统2×××和7×××铝合金相比,Al-Li合金具有更高的比强度和比弹性模量以及可焊性等优点,用在某些航空航天结构件上时,可减少10%~25%的质量.另外,高性能铝锂合金制作飞机结构和部件,由于成本远低于复合材料的,且成形,维修和更换比复合材料简单,同时又可实现减轻结构质量和提高服役性能,在和复合材料的竞争中具有自身优势,因此被认为是21世纪航空航天工业领域中最具竞......
横向振动容许极限车速分别提高了18.7%,24.3%,26.6%和28.0%.当K2>120 MN/m时提升幅度较小. 表3 扣件强化条件下FTT系统横向振动稳定性计算结果 Table 3 Calculation results of lateral vibration stability of FTT system under fastener strengthening 为分析扣件强化对货物...%. 表4 道床强化条件下FTT系统横向振动稳定性计算结果 Table 4 Calculation results of lateral vibration stability of FTT system under ballast bed strengthening 分析道床强化对货物列车运行平稳性的影响,计算v=80 km/h(即v<vL)时FTT系统振动响应.不同K5条件下第2车车体横向......
Trans. Nonferrous Met. Soc. China 31(2021) 1587-1598 Refinement and strengthening mechanism of Mg-Zn-Cu-Zr-Ca alloy solidified under extremely high pressure Xiao-ping LIN1,2,3, Yang KUO1, Lin WANG1... of the intergranular second phase also increases to 22%. Owing to the combined strengthening of grain refinement, solid solution, and dispersion, the compression strength of the Mg–Zn–Cu–Zr–Ca alloy solidified under......
P92钢的蠕变行为研究赵强1,彭先宽1,丛相州1,安威1(1.北京市电力科学研究院北京国电富通科技发展有限责任公司)摘 要:在不同温度和压力条件下完成P92钢的蠕变及持久试验,采用SEM,TEM研究P92钢的强化机制及退化机制.持久试验外推强度同欧洲蠕变委员会公布的数据基本相同.Norton应力指数数值表明,高应力阶段的蠕变机制为位错蠕变.组织观察结果表明:P92钢的主要强化机制为位错强化及弥散强化,淬火得到的马氏体内部有高密度的位错,板条间的碳化物M23C6及弥散分布碳氮化物MX是P92钢热强性高的原因.随着......