Results 151 to 160 of about 455,453 (240)

Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys

Advanced Engineering Materials, EarlyView.
Principal relations and fracture mechanisms of single‐phase and precipitate‐strengthened Fe–Ni–Al alloys subjected to prior electrochemical hydrogen charging are identified. The mechanisms of hydrogen effect on strength and microhardness are discussed, including hydrogen‐induced increase in microhardness and the role of hydrogen in fracture behavior ...
Nataliya Yadzhak, Olha Zvirko, Rostyslav Leshchak, Hryhoriy Nykyforchyn   +3 more
wiley   +1 more source

Electronic Structure of Si-based Superlattice Ⅵ(A)/Si_6/SiO_2/Si_6/Ⅵ(A)

, 2007
【中文摘要】 硅的有效光发射是硅基光电器件研究的一个关键问题,因此一直受到广泛的关注.本文采用第一性原理对新的硅基材料Ⅵ(A)/Sim/SiO2/Sim/Ⅵ(A)(m=6,Ⅵ(A)=O,Se)的能带结构、态密度和电荷密度等进行了计算研究.通过改变掺入Ⅵ(A)族原子氧和硒的对比,分析了SiO2层、不同的Ⅵ(A)族原子以及它们与最近邻Si原子的相互作用对硅基材料电子性质的影响.研究表明,在局域密度近似(LDA)下,O/Si6/SiO2/Si6/O结构在X点存在准直接带隙的特征,而Se/Si6/SiO2 ...
黄美纯, 陈捷
core  

Slip Localization Intensification Mediated by Grain Boundary Sliding in a Polycrystalline Nickel‐Based Superalloy

Advanced Engineering Materials, EarlyView.
The temperature dependence of fatigue behavior in nickel‐based superalloys is investigated through high‐resolution measurements of plastic localization. While increasing temperature reduces localization and enhances fatigue performance in René 88DT, Inconel 718 exhibits a sharp degradation at intermediate temperature due to intensified slip ...
M. Calvat, D. Anjaria, I. Woo, C. Bean, D. Texier, J. C. Stinville   +5 more
wiley   +1 more source

Nanoparticles based interventions for metal(loid) stress mitigation in plants. [PDF]

Stress Biol
Sharma A, Sharma V, Sankhla MS, Awasthi KK, Awasthi A, Awasthi G.   +5 more
europepmc   +1 more source

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source

Ultrasonic cavitation-induced radical processes for tetracycline degradation and Cr(VI) reduction: Highlighting the pivotal role of Cr(V) intermediates. [PDF]

Ultrason Sonochem
Li D, Luo B, Hong F, Li R, Lv Y, Huang Y, Huang D.   +6 more
europepmc   +1 more source

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source

生物炭负载锌铝层状双氢氧化物吸附磷酸盐和Cr（Ⅵ）的研究

Gongye shui chuli
通过液相共沉淀法制备了芦苇秸秆生物炭负载锌铝层状双氢氧化物（ZnAl-LDHs）复合材料（ZnAl-LDHs@BC），考察了复合材料中ZnAl-LDHs质量分数、溶液pH、共存阴离子对水中磷酸盐〔Cr（Ⅵ）〕的吸附性能，并对吸附过程进行了吸附动力学和吸附等温模型模拟分析，最后考察了复合材料对磷酸盐和Cr（Ⅵ）二元废水中磷酸盐、Cr（Ⅵ）的吸附效果。结果表明，ZnAl-LDHs和生物炭之间存在协同效应，76.7% ZnAl-LDHs@BC对磷酸盐〔Cr（Ⅵ）〕表现出优异的去除效果。ZnAl-LDHs ...
俞水, 詹旭, 郭倬瑞, 吴婧雯, 汪雨婷, 孟子琦, 孙连军, 黄俊波   +7 more
doaj  

Retraction: Role of DNA Methylation in Cell Cycle Arrest Induced by Cr (VI) in Two Cell Lines. [PDF]

PLoS One
PLOS One Editors.
europepmc   +1 more source

High‐Temperature Nanoindentation of Metals: Assessing Thermal Drift, Frame Compliance, and Chemical Composition Effects on the Reported Mechanical Properties

Advanced Engineering Materials, EarlyView.
Do not let thermal drift and instrument artifacts deceive high‐temperature nanoindentation results. We compare classical Oliver–Pharr and automatic image recognition analyses across steels and a Ni alloy to quantify these effects. Accounting for artifacts reveals systematic softening with temperature, while Cr and Ni additions boost resistance ...
Velislava Yonkova, Steffen Brinckmann, Ruth Schwaiger   +2 more
wiley   +1 more source