A General Formulation of Eutectic Silicon Morphology and Processing History

2018 ◽  
pp. 381-387 ◽  
Author(s):  
J. E. Spinelli ◽  
W. Hearn ◽  
A.-A. Bogno ◽  
H. Henein
Keyword(s):  
Eutectic Silicon ◽  
Processing History

Factors Influencing the Fatigue Behavior of Ferrous Laminates

1987 ◽  
Vol 109 (3) ◽  
pp. 244-251 ◽  
Author(s):  
J. Wittenauer ◽  
O. D. Sherby
Keyword(s):  
Fatigue Crack ◽  
Fatigue Life ◽  
Carbon Steel ◽  
Fatigue Behavior ◽  
Layered Material ◽  
Factors Influencing ◽  
Ultrahigh Carbon Steel ◽  
Processing History ◽  
Crack Blunting ◽  
Similar Processing

Laminates based on ultrahigh carbon steel were prepared and found to exhibit enhanced fatigue life as compared to a monolithic reference material. This result was achieved through the insertion of weak interlaminar regions of copper into the layered material during preparation of the laminates. The presence of these regions allowed for the operation of a delamination mechanism in advance of the propagating fatigue crack. The result was interlaminar separation and associated crack blunting. Stress-life curves show that an increase in life by as much as a factor of four is achieved for these materials when compared to monolithic specimens of similar processing history.

Effect of processing history on corrosion behaviours of high purity Mg

2021 ◽  
Vol 184 ◽  
pp. 109357 ◽  
Author(s):  
Sang Kyu Woo ◽  
Byeong-Chan Suh ◽  
Ha Sik Kim ◽  
Chang Dong Yim
Keyword(s):  
High Purity ◽  
Processing History

Inoculation and Fading of Sr-Modified A356.2 Aluminum Alloy in Squeeze Casting

2016 ◽  
Vol 850 ◽  
pp. 671-678
Author(s):  
Jian Wei Niu ◽  
Lie Jun Li ◽  
Hai Jun Liu ◽  
Ji Xiang Gao ◽  
Chuan Dong Ren
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Aluminum Alloy ◽  
Hydrogen Absorption ◽  
Deleterious Effect ◽  
Squeeze Casting ◽  
Eutectic Silicon ◽  
Direct Reading ◽  
Air Bag ◽  
Fading Rate

The inoculation and fading behavior of Sr-modified aluminum alloy A356. 2 were studied for air bag bracket produced by squeeze casting. The effects of Sr, P, B contents and casting temperature on the microstructure and eutectic silicon morphology in different periods of inoculation were investigated by SEM and direct-reading Spectrometer. The influence of inoculation fading rate and addition of Sr on the casting mechanical properties and hydrogen absorption was studied. The experimental results showed that the inoculation process was completed in 1 h, and the eutectic silicon morphology can be maintained in almost subsequent 40 h after the addition of Sr. The fading rate decreased appreciably with the increase of casing temperature, P and B contents. The deleterious effect of the inoculation fading of Sr on the casting mechanical property can be compensated by the squeeze casting.

scholarly journals Distribution of aliphatic amines in CO, CV, and CK carbonaceous chondrites and relation to mineralogy and processing history

2017 ◽  
Vol 52 (12) ◽  
pp. 2632-2646 ◽  
Author(s):  
José C. Aponte ◽  
Neyda M. Abreu ◽  
Daniel P. Glavin ◽  
Jason P. Dworkin ◽  
Jamie E. Elsila
Keyword(s):  
Aliphatic Amines ◽  
Carbonaceous Chondrites ◽  
Processing History

Adsorption behaviour of polyphenols on cellulose is affected by processing history

2017 ◽  
Vol 63 ◽  
pp. 496-507 ◽  
Author(s):  
Dongjie Liu ◽  
Marta Martinez-Sanz ◽  
Patricia Lopez-Sanchez ◽  
Elliot P. Gilbert ◽  
Michael J. Gidley
Keyword(s):  
Adsorption Behaviour ◽  
Processing History

Effect of heat treatment on corrosion and ultrasonic cavitation erosion resistance of AlSi10MnMg alloy

2020 ◽  
Vol 62 (9) ◽  
pp. 921-926
Author(s):  
Ion Dragoş Uţu ◽  
I. Mitelea ◽  
I. Bordeașu ◽  
F. Franţ
Keyword(s):  
Solid Solution ◽  
Solution Structure ◽  
Artificial Aging ◽  
Cavitation Erosion ◽  
Erosion Resistance ◽  
Eutectic Silicon ◽  
Solution Treatment ◽  
Mechanical Tests ◽  
Ultrasonic Cavitation ◽  
Cavitation Erosion Resistance

Abstract The investigated alloy is modified by casting with Sr in order to finish the eutectic silicon from microstructure and furthermore subjected to solution treatment followed by natural or artificial aging to improve the usage properties. Metallographic investigations and X-ray diffraction analyses showed that the heat treated microstructure consists of α- solid solution crystals with aluminum base, α + Si eutectic and intermetallic Al-Mn-Si phases. Mechanical tests and ultrasonic cavitation measurements showed that the highest mechanical characteristics and cavitation erosion resistance properties are obtained by applying the solution treatment followed by artificial aging. In contrast, electrochemical tests carried out in a saline concentration of 3.5 % NaCl in order to determine the corrosion rate, indicated that although there are no significant differences between the three structural states, a slight improvement was found in the corrosion behavior after applying the solution treatment followed by both natural and artificial aging. The phenomenon was demonstrated by shifting the values of corrosion currents from 2.66 μm/cm2 for the as-cast state, to 1.81 μm/cm2 and 1.52 μm/cm2, respectively, for the aged states. Finally, analysis of the cavitation eroded surface highlights the presence in the areas with α-solid solution structure of some flat-bottomed striped pinches, characteristic of fatigue fracture and of microcraters in the micro-zones where the fragile intermetallic phases were dislocated.

Paradata in Documentation Standards and Recommendations for Digital Archaeological Visualisations

2020 ◽  
Vol 6 (2) ◽  
pp. 191-220
Author(s):  
Lisa Börjesson ◽  
Olle Sköld ◽  
Isto Huvila
Keyword(s):  
Research Data ◽  
Data Reuse ◽  
Lack Of Information ◽  
National Heritage ◽  
Processing History ◽  
International Harmonisation ◽  
Insight Into ◽  
Current Standards ◽  
Selection Of ◽  
As If

Abstract Digitalisation of research data and massive efforts to make it findable, accessible, interoperable, and reusable has revealed that in addition to an eventual lack of description of the data itself (metadata), data reuse is often obstructed by the lack of information about the datamaking and interpretation (i.e. paradata). In search of the extent and composition of categories for describing processes, this article reviews a selection of standards and recommendations frequently referred to as useful for documenting archaeological visualisations. It provides insight into 1) how current standards can be employed to document provenance and processing history (i.e. paradata), and 2) what aspects of the processing history can be made transparent using current standards and which aspects are pushed back or hidden. The findings show that processes are often either completely absent or only partially addressed in the standards. However, instead of criticising standards for bias and omissions as if a perfect description of everything would be attainable, the findings point to the need for a comprehensive consideration of the space a standard is operating in (e.g. national heritage administration or international harmonisation of data). When a standard is used in a specific space it makes particular processes, methods, or tools transparent. Given these premises, if the standard helps to document what needs to be documented (e.g. paradata), and if it provides a type of transparency required in a certain space, it is reasonable to deem the standard good enough for that purpose.

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