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Trans. Nonferrous Met. Soc. China 25(2015) 2847-2855 Friction stir processing of 7075 Al alloy and subsequent aging treatment Siavash GHOLAMI, Esmaeil EMADODDIN, Mohammad TAJALLY, Ehsan BORHANI...-process aging on the microstructure, mechanical properties and wear behavior of friction stir processed 7075 Al alloy was investigated, using optical microscopy (OM), scanning electron microscopy (SEM......
; 金相组织 图1 固溶+冷轧7075铝合金经80,100和120 ℃时效后的拉伸性能 Fig. 1 Tensile properties of 7075 Al alloy aged at 80, 100 and 120 ℃ after being solution-treated at 475 ℃ for 1 h and cold-rolling...态试样的n相(见图4(j)),表明析出相开始发生粗化,析出相间距增加,数密度降低. 图4 不同处理状态7075铝合金的TEM像 Fig. 4 TEM images for 7075 Al alloy under different processing conditions 3 分析与讨论 作为时效硬化型Al-Zn-Mg-Cu合金,7075合金经过475......
; microstructure grain size prediction 7075铝合金是一种典型的高强度变形铝合金,属于Al-Zn-Mg-Cu合金,具有较高的强度质量比,在航空,航天,船舶,兵器工业中具有不可替代的地位,拥有极其广泛的应用前景. 7075铝合金属于高层错能金属,在热塑性变形过程中动态回复强烈,位错密度难以升高,不易发生"形核-长大"机制的非连续动态再结晶(Discontinuous...镦粗方向将其剖切开来,采用砂纸打磨-光面布金刚石粗抛-绒面布氧化铝细抛-科勒腐蚀剂腐蚀进行制样,得到各试样中心区域的金相组织如图2所示,然后通过金相定量法对各试样金相组织进行晶粒度测量,如表2所列. 表1 7075铝合金成分 Table 1 Component of 7075 aluminium alloy (mass fraction, %) 图1 ......
Trans. Nonferrous Met. Soc. China 23(2013) 3592-3597 Microstructure evolution of semi-solid 7075 Al alloy slurry during temperature homogenization treatment Bin YANG, Wei-min MAO, Xiao-jun SONG... and the shape factor decreases slightly. Key words: semi-solid slurry; 7075 Al alloy; microstructure; primary α(Al) 1 Introduction Semi-solid metal (SSM) processing has been recognized as a unique......
corrosion, exfoliation corrosion behaviors and microstructures of 7075 Al alloy was studied, which were compared with the T6, T73 and RRA treatments. Fine h′ precipitate with high density was obtained..., which decreases the intergranular corrosion and exfoliation corrosion susceptibility of the alloy. Meanwhile, the T6I6 and RRA treatments can keep the high strength of the 7075 Al alloy......
of Process Equipment and Its)Abstract:On an advanced dual-rotary fretting rig, the dual-rotary fretting (DRF) wear behavior of 7075 Al alloy flat against GCr15 steel ball was investigated with various... characteristics of 7075 Al alloy were discussed in detail. The results show that the fretting regimes change with the variation of the contact load, the gross slip regime and mixed fretting regime of dual-rotary......
the strength after T6 treatment. IGC depth is 16.8 μm, which is close to that of the T73 treatment. Key words: 7075 alloy; spray forming; retrogression and re-aging; intergranular corrosion; microstructure 7075铝合金属于7xxx系高强度可热处理Al-Zn-Mg-Cu合金,因其具有比强度高,易加工等优点,被广泛应用于航空航天领域[1-2].传统铸造方法制备的7075合金,由于制备工艺的局限,因此,合金强度很难超过700 MPa[3-4].直至喷射成形等快速凝固技术在7075铝合金制备当中得到应用,使得7075合金的强度提高到730 MPa以上,并使7075合金的制备进入到一个全新阶段. 但是,7xxx系铝合......
Trans. Nonferrous Met. Soc. China 27(2017) 2146-2155 Evolution of second phases and mechanical properties of 7075 Al alloy processed by solution heat treatment Xiu-liang ZOU1,2, Hong YAN1,2, Xiao-hui..., China Received 4 May 2016; accepted 31 August 2016 Abstract: The effects of solution treatment on the evolution of the second phases and mechanical properties of 7075 Al alloy were studied......
and stress corrosion cracking properties in Al-alloy 7075 via retrogression and reaging[J]. Materials Science and Engineering A, 2008, 485(1): 468-475. [16] 黄兰萍, 陈康华, 李 松, 宋 旼. 高温预析出后 7055 铝合金局部腐蚀性能和时效...的水平,且耐蚀性能也接近传统高温RRA制备小尺寸试样的,此工艺更适用于大型件的工业化热处理. 关键词:7075铝合金；喷射成形；再时效；低温回归；预时效；电导率 中图分类号:TG146.2 文献标志码:A 7075铝合金属于7xxx系Al-Zn-Mg-Cu合金,因其具有比强度......
obtained. Key words: 7075 aluminum alloy; recrystallization model; numerical simulation 7075铝合金是Al-Zn-Mg-Cu系可热处理强化的超硬铝合金,广泛用于航空航天,兵器,交通运输等领域高性能复杂构件的成形制造,如7075铝合金多腔阀体类和枝杈类零件[1-2].相对于铸态合金,挤压态7075铝合金由于经过塑性变形... 3190-1996,其具体化学成分见表1[13]. 表1 7075铝合金化学成分 Table 1 Chemical composition of extruded 7075 aluminum alloy (mass fraction, %) 将原始棒料加工成d 10 mm×15 mm的压缩试样,压缩时在样品两端涂覆石墨加机油作为润滑剂,以减小样品与模具之间的摩擦,从而减小......
