Results 1 to 10 of about 167,342 (108)

The Influence of Vibro-Assisted Abrasive Processing on the Surface Roughness and Sub-Surface Microstructure of Inconel 939 Specimen Made by LPBF

open access: yesMaterials, 2023
This paper presents the research results on the influence of vibration abrasive machining parameters on the surface layer integrity of elements made by LPBF technology from Inconel 939.
J. Radziejewska   +3 more
semanticscholar   +1 more source

On as-built microstructure and necessity of solution treatment in additively manufactured Inconel 939

open access: yesPowder Metallurgy, 2022
Increased adoption of additively manufactured superalloys has led to the consideration of revised heat treatment approaches for these materials.
A. S. Shaikh   +3 more
semanticscholar   +1 more source

Existence of φ-fixed point for generalized contractive mappings

open access: yesAIMS Mathematics, 2021
In this paper, we first define the generalized (F, φ, α−ψ)-contraction mappings. In the following, we consider the conditions in which these mappings have a φ-fixed point and also we present examples and applications of these mappings in partial metric ...
Maryam Shams   +3 more
doaj   +1 more source

Effect of Preheating on the Residual Stress and Material Properties of Inconel 939 Processed by Laser Powder Bed Fusion

open access: yesMaterials, 2022
One of the main limitations of laser powder bed fusion technology is the residual stress (RS) introduced into the material by the local heating of the laser beam.
M. Malý   +5 more
semanticscholar   +1 more source

Einstein solitons with unit geodesic potential vector field

open access: yesAIMS Mathematics, 2021
We obtain some results on almost Einstein solitons with unit geodesic potential vector field and provide necessary and sufficient conditions for the soliton to be trivial.
Adara M. Blaga, Sharief Deshmukh
doaj   +1 more source

Design of crack-free laser additive manufactured Inconel 939 alloy driven by computational thermodynamics method

open access: yesMRS Communications, 2022
This paper examined the effect of Si addition on the cracking resistance of Inconel 939 alloy after laser additive manufacturing (AM) process. With the help of CALculation of PHAse Diagrams (CALPHAD) software Thermo-Calc, the amounts of specific elements
C. Zeng, H. Ding, U. Bhandari, S. M. Guo
semanticscholar   +1 more source

Global existence of positive periodic solutions of a general differential equation with neutral type

open access: yesAdvances in Difference Equations, 2021
In this paper, the dynamics of a general differential equation with neutral type are investigated. Under certain assumptions, the stability of positive equilibrium and the existence of Hopf bifurcation are obtained by analyzing the distribution of ...
Ming Liu, Jun Cao, Xiaofeng Xu
doaj   +1 more source

Effect of Part Thickness and Build Angle on the Microstructure, Surface Roughness, and Mechanical Properties of Additively Manufactured IN-939

open access: yesMetallurgical and Materials Transactions. A, 2022
Powder bed fusion-laser beam of metals (PBF-LB/M) has attracted significant interest due to the possibility of producing dedicated design features like thin-walled structures, even though their mechanical response and microstructure are not well ...
A. Fardan   +3 more
semanticscholar   +1 more source

New results and applications on the existence results for nonlinear coupled systems

open access: yesAdvances in Difference Equations, 2021
In this manuscript, we study a certain classical second-order fully nonlinear coupled system with generalized nonlinear coupled boundary conditions satisfying the monotone assumptions.
Imran Talib   +4 more
doaj   +1 more source

Boundary value problem for nonlinear fractional differential equations of variable order via Kuratowski MNC technique

open access: yesAdvances in Difference Equations, 2021
In the present research study, for a given multiterm boundary value problem (BVP) involving the Riemann-Liouville fractional differential equation of variable order, the existence properties are analyzed.
Amar Benkerrouche   +4 more
doaj   +1 more source

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