Results 21 to 30 of about 183,314 (146)
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
, 1986 Ⅰ.前言 由于灾难性工程断裂事故时有发生,工程结构安全性评定引起人们的极大关注。1982年美国Battelle实验室在关于断裂损失的首次综合考察中提出,材料的断裂以及为防止这类破坏所作的努力,使美国工业每年耗费达1190亿美元,相当于国家总产值的4％。但在不增加断裂危险情况下,加强检查、维护和修理,约有29％的断裂耗费可以避免。利用断裂力学的研究成果改进材料制造工艺和加强焊接过程的质量控制,可使每年耗费再减少24％。
李英治, 柳春图
core +2 more sources
Dizhen xuebao, 2018 根据地热井的地层资料，绘制了横穿八宝山断裂带北段的地质剖面图，对八宝山断裂带的深部构造特点进行了探讨，并对几个地热钻孔的地层进行了横向对比。研究结果显示：剖面中存在众多倾角不同、规模不一且相互错断的逆断层，反映出八宝山断裂受逆冲作用非常强烈，同时具有多期性；剖面中存在两条较大的断层，一条是八宝山断裂带的主断层，另一条是雾迷山组小断块被顶托至上部后所形成的次断层，在八宝山一带，次断层的上盘被推覆至主断层线之上将其掩盖，地表仅显示一条断层，即平常所说的八宝山断层，由此可见这并非八宝山断裂带的主断层 ...
Yuanzhang Liu
doaj +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
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
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 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
Dizhen xuebao, 2021 2013年2月19日四川省绵阳市三台县发生MS4.7地震，震中位于四川盆地中部基底断裂绵阳—三台—大足断裂与蒲江—三台—巴中断裂的交会区域。基于地震目录、震相报告和波形等资料，对地震序列进行重定位，采用近远震联合波形反演求解主震震源机制，结合野外地质调查对该地震的发震构造进行分析。余震序列重定位的空间展布方向为NW-SE向，与节面Ⅰ走向吻合，认为此次地震发震断裂走向为NW−SE，倾向为NE，且破裂面近于直立，发震断层在近NS向的近水平挤压应力作用下作右旋走滑错动。实地调查中未见地表破裂及地表断层行迹 ...
Suihai Liu +4 more
doaj +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