Geometric and Chemical Composition Effects on Healing Kinetics of Voids in Mg-bearing Al Alloys

2016 ◽  
Vol 47 (5) ◽  
pp. 2410-2420 ◽  
Author(s):  
Miao Song ◽  
Kui Du ◽  
Chunyang Wang ◽  
Shengping Wen ◽  
Hui Huang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Al Alloys ◽  
Composition Effects ◽  
Kinetics Of

Chemical composition effects in the thin films of the colossal magnetoresistive perovskite manganates grown by MOCVD

1999 ◽  
Vol 09 (PR8) ◽  
pp. Pr8-659-Pr8-666 ◽  
Author(s):  
O. Yu. Gorbenko ◽  
I. E. Graboy ◽  
A. A. Bosak ◽  
V. A. Amelichev ◽  
A. Yu. Ganin ◽  
...  
Keyword(s):  
Thin Films ◽  
Chemical Composition ◽  
Colossal Magnetoresistive ◽  
Composition Effects

scholarly journals Effect of chemical composition and quenching media on recoverable strain in Cu–Zn–Al alloys

2021 ◽  
Vol 12 ◽  
pp. 1368-1379
Author(s):  
Vanja Asanović ◽  
Dragan Radonjić ◽  
Jelena Šćepanović ◽  
Darko Vuksanović
Keyword(s):  
Chemical Composition ◽  
Al Alloys ◽  
Recoverable Strain ◽  
Quenching Media

scholarly journals Kinetics of Ordering in Fe–Al Alloys

1974 ◽  
Vol 15 (2) ◽  
pp. 143-149 ◽  
Author(s):  
Kensuke Oki ◽  
Masayuki Hasaka ◽  
Tetsuo Eguchi
Keyword(s):  
Al Alloys ◽  
Kinetics Of

Kinetics of aging of high-coercivity Fe?Ni?Al alloys

1969 ◽  
Vol 11 (2) ◽  
pp. 93-94
Author(s):  
V. A. Troshkina ◽  
L. A. Kucherenko ◽  
O. A. Alekseeva
Keyword(s):  
Al Alloys ◽  
High Coercivity ◽  
Kinetics Of

scholarly journals Mixing state and compositional effects on CCN activity and droplet growth kinetics of size-resolved CCN in an urban environment

2012 ◽  
Vol 12 (21) ◽  
pp. 10239-10255 ◽  
Author(s):  
L. T. Padró ◽  
R. H. Moore ◽  
X. Zhang ◽  
N. Rastogi ◽  
R. J. Weber ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Water Soluble ◽  
Anthropogenic Sources ◽  
Droplet Growth ◽  
Mixing State ◽  
Aerosol Composition ◽  
Activation Kinetics ◽  
Aerosol Mixing State ◽  
Kinetics Of ◽  
Ccn Activity

Abstract. Aerosol composition and mixing state near anthropogenic sources can be highly variable and can challenge predictions of cloud condensation nuclei (CCN). The impacts of chemical composition on CCN activation kinetics is also an important, but largely unknown, aspect of cloud droplet formation. Towards this, we present in-situ size-resolved CCN measurements carried out during the 2008 summertime August Mini Intensive Gas and Aerosol Study (AMIGAS) campaign in Atlanta, GA. Aerosol chemical composition was measured by two particle-into-liquid samplers measuring water-soluble inorganic ions and total water-soluble organic carbon. Size-resolved CCN data were collected using the Scanning Mobility CCN Analysis (SMCA) method and were used to obtain characteristic aerosol hygroscopicity distributions, whose breadth reflects the aerosol compositional variability and mixing state. Knowledge of aerosol mixing state is important for accurate predictions of CCN concentrations and that the influence of an externally-mixed, CCN-active aerosol fraction varies with size from 31% for particle diameters less than 40 nm to 93% for accumulation mode aerosol during the day. Assuming size-dependent aerosol mixing state and size-invariant chemical composition decreases the average CCN concentration overprediction (for all but one mixing state and chemical composition scenario considered) from over 190–240% to less than 20%. CCN activity is parameterized using a single hygroscopicity parameter, κ, which averages to 0.16 ± 0.07 for 80 nm particles and exhibits considerable variability (from 0.03 to 0.48) throughout the study period. Particles in the 60–100 nm range exhibited similar hygroscopicity, with a κ range for 60 nm between 0.06–0.076 (mean of 0.18 ± 0.09). Smaller particles (40 nm) had on average greater κ, with a range of 0.20–0.92 (mean of 0.3 ± 0.12). Analysis of the droplet activation kinetics of the aerosol sampled suggests that most of the CCN activate as rapidly as calibration aerosol, suggesting that aerosol composition exhibits a minor (if any) impact on CCN activation kinetics.

Influence of High-Calcium Ash Composition on the Composite Binders’ Properties

2021 ◽  
Vol 316 ◽  
pp. 1019-1024
Author(s):  
O. A. Ignatova ◽  
A. A. Dyatchina
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Cement Stone ◽  
Normal Density ◽  
Fine Aggregate ◽  
Equivalent Amount ◽  
High Calcium ◽  
Composition Structure ◽  
Kinetics Of ◽  
Positive Effect

The paper presents the studies’ results of chemical composition, structure, and physico-mechanical properties of high-calcium ashes from the Kansk-Achinsk coals (2017-2019 selection). It was found that ash has a complex poly-mineral composition and contains hydraulically active minerals and oxides of СаОfr, β-C2S, CA, C3A, C4AF, C2F, CaSO4. According to the content of CaOfr, MgO does not meet standards’ requirements. The uniformity of the volume change is maintained by the composition with 50% of cement. The structure and hardening kinetics of ash and ash-cement stone compositions, obtained from the test of normal density, were analyzed. It was established that the hardening of compositions with ash from the Kansk-Achinsk coals was largely influenced by ash minerals. An equivalent amount of cement in composite binders cannot be replaced. In order to obtain a positive effect, compositions with ash instead cement of no more than 30% and a part of fine aggregate, without exceeding the ratio of ash: cement = 1: 1, should be used.

Kinetics of Martensite Formation in Substitutional Fe-Al Alloys: Dilatometric Analysis

2012 ◽  
Vol 44 (3) ◽  
pp. 1430-1440 ◽  
Author(s):  
Yongchang Liu ◽  
Lifang Zhang ◽  
Ferdinand Sommer ◽  
Eric Jan Mittemeijer
Keyword(s):  
Al Alloys ◽  
Martensite Formation ◽  
Dilatometric Analysis ◽  
Kinetics Of ◽  
Substitutional Fe

Efficiency of Microstructure Refinement in Ti-Based Alloys

2021 ◽  
Vol 1016 ◽  
pp. 1753-1758
Author(s):  
Sergey Zherebtsov ◽  
Nikita Stepanov ◽  
Gennady Salishchev
Keyword(s):  
Plastic Deformation ◽  
Chemical Composition ◽  
Titanium Alloys ◽  
Microstructure Evolution ◽  
Large Plastic Deformation ◽  
Two Phase ◽  
Microstructure Refinement ◽  
Kinetics Of ◽  
Rate Type ◽  
Lamellar Type

The influence of various factors on the efficiency of microstructure refinement in two-phase titanium alloys with respect to a well-known Ti-6Al-4V alloy was discussed. The kinetics of microstructure evolution in titanium alloys with a lamellar type α/β microstructure during large plastic deformation depends mainly on temperature and strain rate, type of the initial microstructure, thickness of the α lamellae, path of deformation and chemical composition. Each parameter should be controlled to provide the most efficient microstructure refinement during conventional metalforming methods.

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