scholarly journals Estimation of Single-grain Properties of Steel through Inverse- engineering of Microindentation Experiments: Uniqueness of the Solution

2014 ◽  
Vol 3 ◽  
pp. 215-220
Author(s):  
Lisa Tang ◽  
Carey L. Walters
2019 ◽  
Vol 2 (4) ◽  
pp. 87 ◽  
Author(s):  
Isa Doverbratt ◽  
Helena Alexanderson

The grain transfer protocol presents a step-by-step guide on how to successfully transfer positioned grains from a single-grain luminescence disc to a scanning electron microscope (SEM) specimen stub and how to transport them between laboratories. Single-grain luminescence analysis allows the determination of luminescence characteristics for individual sand-sized grains. By combining such luminescence data with other grain properties such as geochemical composition, shape, or structure also at single-grain level, it is possible to investigate factors controlling luminescence signals or study other material properties. The non-luminescence properties are typically measured in another instrument; thus, grains need to be transferred between machines and sample holders, and sometimes also between laboratories. It is then important that the position of each grain is known and stable so that the properties from the same grain are compared. By providing an easily observable orientation marker on the specimen stub, the hundred numbered grains from the single-grain disc can be transferred and later identified when analyzed in the SEM.


2021 ◽  
Vol 111 (01-02) ◽  
pp. 77-81 ◽  
Author(s):  
Thomas Bergs ◽  
Marc Bredthauer ◽  
Patrick Mattfeld ◽  
Sebastian Barth

Dieser Beitrag stellt die Ergebnisse von Verschleißuntersuchungen beim Einkornritzen mit CBN-Körnern dar. Der Fokus der Forschungsarbeit liegt auf der Identifizierung und Quantifizierung der Verschleißmechanismen in Abhängigkeit von den Prozesseinstellgrößen und den Korneigenschaften. Es werden charakteristische Phasen der Verschleißentwicklung identifiziert, die eine Zuordnung der Verschleißmechanismen Mikrobruch, Makrobruch und Abrasion zulassen.   The content of the paper is the presentation of the results of wear investigations on CBN grains used in single grain scratching. The focus of the research work is on the identification and quantification of the wear mechanisms as a function of the process parameters and the grain properties. Characteristic phases of wear development were identified, which allow an allocation of the wear mechanisms micro fracture, macro fracture and abrasion.


2002 ◽  
Vol 7 (1) ◽  
pp. 93-104 ◽  
Author(s):  
Mifodijus Sapagovas

Numerous and different nonlocal conditions for the solvability of parabolic equations were researched in many articles and reports. The article presented analyzes such conditions imposed, and observes that the existence and uniqueness of the solution of parabolic equation is related mainly to ”smallness” of functions, involved in nonlocal conditions. As a consequence the hypothesis has been made, stating the assumptions on functions in nonlocal conditions are related to numerical algorithms of solving parabolic equations, and not to the parabolic equation itself.


2002 ◽  
Vol 715 ◽  
Author(s):  
Sang-Hoon Jung ◽  
Jae-Hoon Lee ◽  
Min-Koo Han

AbstractA short channel polycrystalline silicon thin film transistor (poly-Si TFT), which has single grain boundary in the center of channel, is reported. The reported poly-Si TFT employs lateral grain growth method through aluminum patterns, which acts as a selective beam mask and a lateral heat sink during the laser irradiation, on an amorphous silicon layer. The electrical characteristics of the proposed poly-Si TFT have been considerably improved due to grain boundary density lowered. The reported short channel poly-Si TFT with single grain boundary exhibits high mobility as 222 cm2/Vsec and large on/off current ratio exceeding 1 × 108.


2019 ◽  
Author(s):  
Jennifer Gifford ◽  
◽  
Blake Oswell LaDouceur ◽  
William J. Davis ◽  
Shawn J. Malone
Keyword(s):  

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Kordan N. Ospanov

AbstractWe give some sufficient conditions for the existence and uniqueness of the solution of a higher-order linear differential equation with unbounded coefficients in the Hilbert space. We obtain some estimates for the weighted norms of the solution and its derivatives. Using these estimates, we show the conditions for the compactness of some integral operators associated with the resolvent.


2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Idris Ahmed ◽  
Poom Kumam ◽  
Jamilu Abubakar ◽  
Piyachat Borisut ◽  
Kanokwan Sitthithakerngkiet

Abstract This study investigates the solutions of an impulsive fractional differential equation incorporated with a pantograph. This work extends and improves some results of the impulsive fractional differential equation. A differential equation of an impulsive fractional pantograph with a more general anti-periodic boundary condition is proposed. By employing the well-known fixed point theorems of Banach and Krasnoselskii, the existence and uniqueness of the solution of the proposed problem are established. Furthermore, two examples are presented to support our theoretical analysis.


2020 ◽  
Author(s):  
Vipin Kumar Singh ◽  
Sudipta Roy Barman
Keyword(s):  

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