Results 111 to 120 of about 621,452 (179)
The stability criteria affecting the formation of high‐entropy alloys, particularly focusing in supersaturated solid solutions produced by mechanical alloying, are analyzed. Criteria based on Hume–Rothery rules are distinguished from those derived from thermodynamic relations. The formers are generally applicable to mechanically alloyed samples.
Javier S. Blázquez +5 more
wiley +1 more source
A Workflow to Accelerate Microstructure‐Sensitive Fatigue Life Predictions
This study introduces a workflow to accelerate predictions of microstructure‐sensitive fatigue life. Results from frameworks with varying levels of simplification are benchmarked against published reference results. The analysis reveals a trade‐off between accuracy and model complexity, offering researchers a practical guide for selecting the optimal ...
Luca Loiodice +2 more
wiley +1 more source
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios +5 more
wiley +1 more source
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth +6 more
wiley +1 more source
化学还原-沉淀法对地下水中Cr(Ⅵ)和Ni2+的去除效果研究
针对工业废水渗滤导致的地下水六价铬〔Cr(Ⅵ)〕和镍(Ni2+)复合污染问题,采用硫酸亚铁(FeSO4·7H2O)化学还原法结合氢氧化物沉淀法开展修复研究。以Cr(Ⅵ)-Ni2+复合污染的模拟地下水为处理对象,系统考察了模拟水样初始pH、FeSO4·7H2O投加量、沉淀反应pH和离子沉淀顺序对Cr(Ⅵ)和Ni2+去除效能的影响,得到两种优化后的去除方案,即在pH为7左右的原水体系中,按Cr(Ⅵ)与FeSO4·7H2O质量比1∶18投加FeSO4·7H2O,将Cr(Ⅵ)还原为Cr(Ⅲ)后调节体系pH至9 ...
牛建敏 +7 more
doaj +2 more sources
采用氢氧化钠-异丙醇对松树叶进行化学改性,同时将改性松树叶用于对Cr(Ⅵ)的吸附实验。通过单因素实验,考察了处理条件对Cr(Ⅵ)吸附效果的影响。结果表明,对50 mL质量浓度为10.0 mg/L的Cr(Ⅵ)溶液,在溶液pH=3.0,投加改性松树叶0.2 g,温度30℃,接触时间90 min的条件下,Cr(Ⅵ)的去除率可达82%以上。改性松树叶在20~30℃对Cr(Ⅵ)的吸附是吸热过程,以离子交换吸附为主,吸附过程遵循Freundlich吸附等温线。
杜婷 +4 more
doaj
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich +3 more
wiley +1 more source
以传统活性炭(木质炭、煤质炭)与碳纳米管为碳基吸附剂,研究不同碳基吸附剂对Cr(Ⅵ)的吸附效果,并对其吸附动力学进行研究。结果表明,传统活性炭对Cr(Ⅵ)的吸附性能优于碳纳米管,木质、煤质活性炭和碳纳米管对Cr(Ⅵ)的理论最大吸附量分别为158.23、152.44、48.69 mg/g;传统活性炭和碳纳米管对Cr(Ⅵ)的吸附过程均符合准二级动力学方程;传统活性炭和碳纳米管对Cr(Ⅵ)的吸附属于物理吸附。
刘航 +5 more
doaj
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar +7 more
wiley +1 more source
This study applies machine learning regression to predict chromium layer thickness in decorative trivalent chromium electroplating, using 441 experiments from laboratory‐scale (1L) and pilot‐scale (14L) setups. Tree‐based models, particularly CatBoost, outperformed linear regression by capturing nonlinear parameter interactions (R2$R^2$ up to 0.77 ...
Christoph Baumer +4 more
wiley +1 more source

