Results 21 to 30 of about 51,229 (144)
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Laser‐directed energy deposition (L‐DED) offers a flexible route for fabricating γ‐TiAl components, but the as‐deposited microstructure requires post‐processing to overcome limited deformation capability. Here, an L‐DED Ti–48Al–2Cr–2Nb alloy was subjected to solution and solution‐aging treatments.
Mengya Chu +6 more
wiley +1 more source
Microstructure Tailoring of Laser Powder Bed Fused Nb521 Alloy Toward Strength‐Ductility Synergy
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Niobium‐based refractory alloys are promising candidates for high‐temperature aerospace structures, yet their limited ambient‐temperature ductility and poor processability remain major barriers to broader implementation. Here, Nb521 alloy was fabricated by laser powder bed fusion (LPBF), and the effects of processing conditions and subsequent ...
Lele Qin +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT This study presents an assessment of four representative expansive additives—calcium sulphoaluminate–calcium oxide, magnesium oxide, sodium lauryl sulfate, and sodium abietate—and their effects on the expansion behavior, mechanical development, and microstructural characteristics of cemented paste backfill (CPB).
Lijie Guo +5 more
wiley +1 more source
Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, Volume 250, Issue 2, Page 1231-1247, April 2026.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
wiley +1 more source
Rare Metals, Volume 45, Issue 1, January 2026.ABSTRACT Introducing solid‐state phase transformations into the design of heterogeneous structures is considered an effective strategy for simultaneously optimizing both microstructure and mechanical properties. This study investigates the thermodynamic and kinetic mechanisms of the γ → α transformation in Ti48Al5Nb2Cr0.6Re0.1C alloy under different ...
Ke‐Xuan Li +6 more
wiley +1 more source
, 1982 一、前言电气石是一种斜角棱形压电晶体,z轴为它的电轴。它是一种天然晶体(目前已出现人造电气石晶体)。它的特点是:压电性能稳定;侧向灵敏度(指在x或y轴向加以单位载荷时在z平面上产生的电荷,即d_(31))小;机械强度高;对温度比较敏感 ...
张挺, 金若冰
core +2 more sources
, 2013 针对轴压薄壁圆柱壳结构,首先通过实验研究了其临界屈曲载荷和屈曲模态,并和理论及数值模拟进行了对比,结果基本一致。轴压柱壳屈曲行为对局部缺陷敏感,入射激光相当于引入了局部缺陷,可能大大影响屈曲行为。通过实验和数值模拟研究了入射激光对轴压薄壁圆柱壳屈曲行为的影响,结果表明:(1)实验中辐照区温度上升引起材料热软化,降低了局部强度,从而大大降低了轴压柱壳的临界屈曲载荷;(2 ...
黄亿辉 +3 more
core +2 more sources
, 2021 本发明属于轴承装配领域，具体地说是一种基于轴固定的轴承自动压装机组及其控制方法，轴承自动压装机组包括框架、安装在框架底座上的支撑台、安装于框架上的升降机构、安装于升降机构上的夹紧机构和压装机构，操作人员放好轴与轴承并启动设备后，升降机构下降，夹紧机构夹紧轴，由压装机构进行轴承内圈压装，之后夹紧机构松开轴，由压装机构进行轴承外圈压装。本发明实现轴承的自动压装，可保证轴承内圈与外圈同时压装到位，既减轻了操作者的劳动强度 ...
荣胜波 +5 more
core
Jianzhu Gangjiegou Jinzhan, 2015 为了研究椭圆钢管混凝土柱的轴压性能和承载力,通过ABAQUS程序建立了轴压作用下椭圆钢管混凝土柱的数值分析模型,考虑了复杂接触问题、材料非线性和椭圆特征。利用试验结果验证了数值分析模型的准确性。开展了轴压作用下椭圆钢管混凝土短柱的诸多参数分析,评价了各参数对组合柱轴压承载力和刚度的影响,揭示了椭圆钢管混凝土短柱的破坏模式和受力机理,基于统一理论提出了椭圆钢管混凝土短柱的轴压承载力简化计算方法。研究结果表明,椭圆钢管混凝土短柱在轴压作用下的破坏模式包括剪切破坏、局部鼓曲破坏和整体鼓曲破坏 ...
沈奇罕, 王静峰, 王伟, 王珺
doaj
, 2010 本发明公开了一种对列阵器件进行光束快轴压缩的方法，该方法包括:制作列阵器件光束快轴压缩用圆柱透镜;确定该圆柱透镜与列阵器件之间的位置关系;按照确定的位置关系将圆柱透镜与列阵器件用紫外胶粘结固定在一起。利用本发明，能够满足列阵器件和叠层列阵器件光束快轴压缩的要求 ...
马骁宇, 刘媛媛, 李 伟
core