Results 81 to 90 of about 4,047,917 (285)

Effect of Oxygen Content on Surface and Subsurface Integrity During Turning of Ti–6Al–4V

Advanced Engineering Materials, EarlyView.
This study examines how oxygen content in the ambient atmosphere affects the surface and subsurface properties of Ti–6Al–4V during turning. Results show that oxygen does not influence surface roughness. However, machining in an extremely high vacuum‐adequate atmosphere increases surface hardness by up to 7.8% and induces compressive residual stresses ...
Benjamin Bergmann, Berend Denkena, Hilke Petersen, Florian Schaper   +3 more
wiley   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
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, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Removing Oxide Layers and Retaining Oxide‐Free Steel Surfaces by Polishing in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this study, the efficacy of wet mechanical polishing under an oxygen‐free atmosphere for deoxidation and the retention of an oxide‐free steel surface are elucidated using X‐ray photoelectron spectroscopy. The methodology proved successful; however, the results were highly dependent on the preparation of the solvents used to clean the samples after ...
Friedrich Bürger, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +2 more
wiley   +1 more source

The Strategy of Integration for the Navigation Specialization Students on Maritime Market [PDF]

Ovidius University Annals: Economic Sciences Series, 2016
The current situation of young graduates of specialization Sailing, to engage aboard commercial shipsis difficult. Romanian students in this specialization, which must carry out internship craft, not easy tofind places to practice on board merchant ...
Florin Iordanoaia
doaj  

Historical Feature Pattern Extraction Based Network Attack Situation Sensing Algorithm

The Scientific World Journal, 2014
The situation sequence contains a series of complicated and multivariate random trends, which are very sudden, uncertain, and difficult to recognize and describe its principle by traditional algorithms. To solve the above questions, estimating parameters
Yong Zeng, Dacheng Liu, Zhou Lei
doaj   +1 more source

Assessing Altered Coating Adhesion on Plasma‐Deoxidized Surfaces Under Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
This study demonstrates the effectiveness of atmospheric pressure plasma pretreatment in modifying silicon and stainless steel surfaces to improve adhesion. Argon‐hydrogen plasma increases surface roughness and improves adhesion strength, whereas pure argon results in smoother surfaces and structural changes.
Selina Raumel, Lara Kuhr, Khemais Barienti, Sebastian Herbst, Florian Nürnberger, Hans Jürgen Maier, Marc C. Wurz   +6 more
wiley   +1 more source

Striving for Difficulty as a Type of Perception of Life Situations

Вестник Московского университета. Серия 14: Психология
Background. Studying the types of perception of difficult life situations is a demanded task, since knowledge about the subject’s perception of ongoing events allows us to predict the characteristics of his interaction with the situation.
Ekaterina V. Bityutskaya , Marina I. Kunashenko   +1 more
doaj   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

Advanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat, Guido Barale, John Stavridis, Ehsan Norouzi, Jin‐Yoo Suh, Dong‐Ik Kim, Luca Iuliano, Abdollah Saboori   +7 more
wiley   +1 more source

Features assist families in difficult life situations and socially dangerous situation

Психология и Психотерапия Семьи, 2018
The article describes the experience of the psychologist in the system of prevention of social orphanhood. To summarize my experience, we used the methods of observation, structured interview of parents, family study of social — and genograms, projective
Inna Isaeva
doaj  

GUIDELINE FOR MEDICO-SOCIAL CARE DEPARTMENTS IN CHILDREN’S POLYCLINICS

Вопросы современной педиатрии, 2013
Aim: to improve interdisciplinary care (medical, social and psychological) in children's polyclinics. Materials and methods: at first, authors selected interdisciplinary departments in polyclinics with effective medico-psychosocial care for children ...
V. Yu. Al'bitskii, N. V. Ustinova, O. V. Kulikov, A. V. Kim, M. V. Muratova, Z. A. Roslova, N. V. Timakova, A. L. Rubezhov, A. Z. Farrakhov, R. F. Shavaliev   +9 more
doaj   +1 more source