Cheng LÜ
材料科学技术（英文）
Thermal, mechanical and microstructural phenomena are involved in the process of steel quenching. Based on the coupled metallo-thermo-mechanics theory, a calculation model has been developed in this study to simulate the quenching process of a gas turbine compressor disk by finite element method. The thermal physical and mechanical properties were treated as a functions of temperature. Moreover, a series of subroutines were developed on the MARC software platform. Consequently, simulated results on temperature, internal stress and distortion during the quenching were illustrated. With the aid of the simulated results, an optimum quenching scheme was proposed. The quenching process simulated in this study appears to be a promising tool in design of heat-treatment processing parameters for gas turbine compressor disks.
关键词:
Quenching stress
,
stress
,
Distortion
,
Finite
,
eleme
Peggy Zhen Zhen Ngu
,
Stephanie Pei Phing Chia
,
Jessica Fung Yee Fong
,
Sing Muk Ng
新型炭材料
doi:10.1016/S1872-5805(16)60008-2
以废米糠为原料,浓硫酸为脱水剂,通过炭化法制备出炭纳米颗粒( CNPs),探讨CNPs荧光发射特征、金属离子的淬灭效应以及作为Sn(II)离子传感材料应用。 CNPs产率最佳条件为：硫酸浓度12 mol/L、加热温度120℃及恒温时间30 min。样品在水中强蓝光的最大发射波为439 nm。通过加入金属离子,使金属离子与CNPs表面间形成复合物而淬灭荧光。 Sn(II)离子对CNPs荧光具有显著的淬灭效应。 Sn(II)离子浓度对淬灭效应符合Stern-Volmer线性关系,Sn(II)离子为6.13 mmol/L。 Sn(II)离子的检测限为18.7μmol/L。
关键词:
炭纳米颗粒
,
荧光
,
淬灭
,
传感
,
金属离子
