Results 21 to 30 of about 7,869 (117)
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Precipitation of isothermal ω phase is an effective way to strengthen the metastable β‐Ti alloys but generally severely embrittles the materials by suppressing stress‐induced martensitic transformation and deformation twinning. Here, we architect heterogeneous structures with tailored ω phase in a metastable β‐Ti‐20Zr‐12Nb‐2Sn alloy via ...
Yang Liu +6 more
wiley +1 more source
Gaoya dianqi, 2023 高频融冰热效率高，具有实现输电线路在线融冰的发展前景，揭示融冰过程中温升与环境等因素的变化规律对于实际应用具有重要意义。文中建立了覆冰线路高频融冰模型，重点考虑了冰层下移时环境温度、风速和覆冰厚度等因素对冰层内表面温升的影响。研究结果表明：在融冰过程中，对流换热强度影响冰层内表面温升速率，风速降低、环境温度升高，对流换热强度减弱，温升速率均增大，但温升速率随覆冰厚度增大而减小。因而选择合适的环境条件和覆冰厚度时机进行融冰能有效提高温升速率和缩短融冰时间。
曾薇, 周羽生, 黄欣超, 周文晴
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Gradient structures (GS) introduced by plastic deformation have been shown to effectively enhance the surface properties of metallic materials. However, the GS fabricated by existing methods often suffers from limited hardening depth and limited control over the GS layer, which constrain their engineering applications.
Yansong Guo +5 more
wiley +1 more source
Gaoya dianqi, 2013 笔者旨在研究单面交流金属封闭开关设备和控制设备（以下简称开关柜）等效温升试验方法代替多面并柜开关柜中间柜进行温升试验的可行性,并采用等效温升试验方法对开关柜进行温升试验。基于GB/T11022—2011与GB 3906—2006中型式试验部分关于温升试验的要求,以开关柜为研究对象进行温升试验,对比分析采用单面开关柜进行温升试验与3面开关柜并柜中间开关柜通电情况下温升试验结果,并采用该温升等效试验方法对开关柜进行试验,对比分析两种通流试验方式下的试验结果。试验结果显示采用单面等效性温升试验方法 ...
贾一凡, 王博, 陆瑶, 李林峰
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Infrared (IR) stealth is crucial for improving the survivability of equipment. The growing demand for service in marine environments poses new challenges to the composition and structural design of existing IR stealth coatings. This study first investigates the effects of NaCl/water vapor corrosion on the IR stealth performance of GH3536 and a
Kang Wang +5 more
wiley +1 more source
四川大学学报. 自然科学版, 1978 我国水轮发电机定子升温计算一直沿用30年代理论,50年代的国外公式进行平均温升计算,按这种方法计算的升温有三个问题:1.把通风与升温完全独立开来,温升计算时不考虑通风冷却条件,反映不出它们的因果关系;2.脱离实际的硬性规定温升分布是轴对称的,不仅是最高温升的地点不对,数值大小也不准确;
王世明, 欧阳全安
doaj
Uncovering correlates of decline and critical refuges for a threatened terrestrial mammal
Conservation Biology, Volume 40, Issue 4, August 2026.Abstract Globally, the geographic ranges of numerous species are contracting. Identifying spatiotemporal patterns of threat impact can illuminate why species decline in some parts of their range but persist in others. We developed a correlative approach to identify species’ response thresholds and locate ecological refuge areas associated with ...
Natalya M. Maitz +5 more
wiley +1 more source
Gaoya dianqi, 2018 为研究基于红外检测的GIS内部过热缺陷严重程度的评估方法,分别在母线三相共箱结构GIS腔体内的A相和B相设置"工"字形导体,模拟GIS内部导体接触不良引起的过热缺陷,开展了不同电流下的GIS温升实验。实验中,采用电子式测温技术和红外测温技术分别对GIS内部导体以及壳体的温度进行测量。实验结果表明,模拟缺陷分别设置于A相和B相时,前者内部导体和壳体的温升均高于后者。内部导体和壳体的温升在轴向上呈现出先升高后降低的变化趋势,模拟缺陷处的温升值最大。通过分析内部导体和壳体的温升关系 ...
刘凯 +4 more
doaj
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT The construction of core–shell grains can enhance the coercivity of Nd2Fe14B magnets. However, it is a significant challenge to elucidate the formation of these core–shell grains particularly regarding the spontaneous core–shell structure in Y‐substituted Nd2Fe14B alloys.
Sining Fan +13 more
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Mg‐based composites have been considered as promising structural materials for aerospace and automotive applications owing to their high specific strength and stiffness. However, their low room‐temperature ductility and absolute strength have limited their wide application.
Zhipeng Zhong +4 more
wiley +1 more source