Results 31 to 40 of about 182,819 (144)
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Carbides strengthen the grain boundaries; nevertheless, excessive carbide precipitates embrittle the grain boundaries of high‐temperature alloys during prolonged service. Here, we provide direct evidence of solute rare‐earth atoms and demonstrate that they can trap vacancies and inhibit interstitial diffusion, restraining carbide precipitation
Jiali Zhang +10 more
wiley +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Gram‐negative (G−) bacterial infections, fueled by intrinsic antibiotic resistance stemming from their unique outer membrane architecture, pose a critical global clinical challenge. This study introduces a pioneering dual‐enzyme‐mimetic nanotherapy based on NaYbF4 nanoparticles (NaYbF4 NPs) that achieves synergistic antibacterial and anti ...
Yuxiang Zhang +6 more
wiley +1 more source
Dizhen xuebao以云南区域GNSS速度场为约束，采用克里金插值方法分时段估计了1999—2007年、2009—2014年和2015—2020年这三期的区域应变率场，获取了滇东南弧形构造带现今区域的形变演化特征；然后利用GNSS剖面方法计算了红河断裂带中南段、石屏—建水断裂带和曲江断裂的滑动速率；最后利用研究区域内现有的GNSS连续观测资料，构建了五组分别跨红河断裂带中段、红河断裂带南段、石屏—建水断裂、曲江断裂和小江断裂带中南段区域的地块，获取其应变时序，并基于此分析了相关断裂现今的运动特征 ...
Lingli Wang +5 more
doaj +1 more source
Gaoya dianqi, 2021 针对一起500 kV断路器弹簧机构储能过程中储能轴断裂事故,对断裂部件进行了理化检验,明确了储能轴断裂并非该部件的质量原因。通过对断路器解体,分析断路器储能过程机构的工作原理,发现储能凸轮和顶杆啮合不足,导致合闸弹簧在无负载的情况下带动储能轴"反打",是造成储能轴断裂的原因。
焦宗寒, 郑欣, 杨迎春, 代克顺
doaj
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT A synergistic strategy combining a Ti interlayer and circular beam oscillation was proposed to improve the laser weldability of 6082‐T6 aluminum alloy. The Ti interlayer suppressed porosity, eliminated columnar grains, and significantly reduced grain size by 67.7% at the weld center. Mechanistically, fine L12‐Al3Ti precipitates clearly showing
Zhongping Hou +8 more
wiley +1 more source
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
, 2010 在断裂力学基础上建立起来的材料抵抗裂纹扩展断裂的韧性性能称为断裂韧性。断裂韧 性与其它韧性性能一样，综合反映了材料的强度和塑性，在防止低应力脆断选用材料时，
中国科学院老科技工作者协会工程力学分会
core +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT Bimetallic structures fabricated by laser powder bed fusion (LPBF) provide an effective strategy for achieving multifunctional integration, yet interfacial structural continuity and the role of lattice defects remain insufficiently understood.
Jinguo Ge, Shuo Yin
wiley +1 more source
Predictive evolutionary genomics: principles, validation, and practice
New Phytologist, Volume 252, Issue 1, Page 36-48, October 2026.Summary Climate change and habitat loss are driving rapid evolutionary responses in populations world‐wide, which creates an urgent need for evolutionary forecasting in conservation and agriculture. Such forecasting can be categorized into three time scales: trait‐based models that use multivariate quantitative genetic equations to project correlated ...
Daniel Ortiz‐Barrientos +5 more
wiley +1 more source
, 2015 断裂力学是固体力学的一个分支，人们说“断裂力学是破解结构低应力破坏的金钥匙”。这里，我们就来谈谈断裂力学发展过程中的一些趣事吧。 一．“彗星号”大型客机失事惨剧促发断裂力学的诞生 1954年1月10日，一架英国海外航空公司（BOAC）的一架“彗星”1型客机（航班编号781号）从意大利罗马起飞，飞往目的地是英国伦敦。飞机起飞后26分钟，机身在空中解体，坠入地中海，机上所有乘客和机组人员全部遇难。这次事故震惊了全世界 ...
张双寅
core +1 more source