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J. Cent. South Univ. (2020) 27: 1645-1653 DOI: https://doi.org/10.1007/s11771-020-4396-9 Evolution of surface roughness of a cast Al-Si-Cu piston alloy during thermal exposure BAO Tong(保彤)1, LI... for 2 h at temperatures ranging from 400 to 550°C. The evolution of surface roughness and microstructure of the alloy during thermal exposure was studied by combination methods of roughness profiles......
TEM study on microstructures and properties of 7050 aluminum alloy during thermal exposure SHEN Kai(沈 凯)1 , CHEN Jin-ling(陈金灵)1, YIN Zhi-min(尹志民)2 1. School of Materials Science and Technology...; Abstract: The microstructures of 7050 aluminum alloy under different thermal exposure conditions were investigated by means of transmission electron microscopy (TEM), high resolution......
coating was deposited on TC4 titanium alloy using arc ion plating,and the stability of NiCrAlY coating/TC4 substrate system under pure thermal exposure was analyzed in a wide temperature range.During the thermal exposure,β→γ′→γphase transformation takes place in the NiCrAlY coating.The NiCrAlY coating phases totally decompose above the allotropic transformation temperature of TC4.The allotropic......
Influence of Thermal Exposure on Mechanical Properties of C/Al Composite郭树启,隋全武,郭文旭,唐凤军摘 要:<正> In this paper were studied the microstructureand...-ray analyses indicate that there isAl4C3 phase in the composites and its amount inthe composites increases when the composites areexposed.In the case of exposure the strength of thecomposites......
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数)进行不同温度(250,350,450,550 ℃),时间2 h的热暴露试验.采用表面粗糙度仪,金相显微镜,扫描电子显微镜,专业型同步热分析仪等测试方法相互结合,对两种Al-Si合金在高温热暴露条件下表面状态的变化进行研究.结果表明:Al-x%Si二元合金的粗糙度变化基本遵循Ra, T6>Ra, thermal exposure>Ra, as-cast的规律;随着热暴露温度的升 高,Al-12...糙度仪最大示值误差10%设置误差棒.由图4可以看出:经过T6热处理后,两种Al-Si合金表面粗糙度明显高于铸态;在经过热暴露处理后,粗糙度较热处理状态大致呈现降低趋势.两种Al-Si合金的表面粗糙度均基本遵循Ra, T6>Ra, thermal exposure> Ra, as-cast.在Al-12%Si中热处理后粗糙度明显增大,在经过250 ℃热暴露后粗糙度继续升高,随着热暴露温度的升高,粗糙......
evolution and its effect on the impact toughness of a new Ni-Fe based alloy GH984 G,used in 700℃ ultra-super critical coal-fired power plant,were investigated during thermal exposure at 650℃-750℃ for up to 10,000 h.The results show that the impact toughness at room tempe rature drops rapidly at the early stage during thermal exposure at 700℃ and then has no significant change even if after exposure......
of 760℃ for 100 h and 870℃ for 100-1000 h.The size of both FGs and CGs remains no significant changes after thermal exposure treatments.The microstructural stability is associated with the slow kinetics of grain growth and the pinning of carbides.The thermal stability enables to maintain the BG structures,leading to the same mechanical properties as the sample without thermal exposure treatment.In......
and Structures,Harbin Institute of Technology摘 要:An attempt has been made here to evaluate the effect of thermal exposure on the mechanical behavior and failure mechanisms of carbon fiber composite sandwich panel with pyramidal truss core under axial compression.Analytical formulae for the collapse strength of composite sandwich panel after thermal exposure were......
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