Results 181 to 190 of about 4,247,919 (214)

HWTS 50 Tool Steel Tailored for Laser Powder Bed Fusion: Sliding Wear of Bare Surfaces and Nitriding Response in Comparison with 18Ni300 and AISI H13

steel research international, EarlyView.
This work investigates the wear resistance and nitriding behavior of PBF‐LB/M‐processed Osprey HWTS 50, a lean hot work tool steel. Three heat treatment conditions are compared to conventional wrought H13, H11, and PBF‐LB/M 18Ni300. The study highlights HWTS 50's enhanced nitrogen diffusion, deeper nitriding hardness depth, and comparable or improved ...
Jonathan Hann, Giorgia Lupi, Sylvain Dossin, Riccardo Casati, Mandanà Moshiri, Arne Röttger, Faraz Deirmina   +6 more
wiley   +1 more source

Tailoring Laser Powder Bed Fusion and Post‐Processing Parameters for JIS SKD61 Tool Steels: Surface Roughness, Microstructure, and Mechanical Properties

steel research international, EarlyView.
Laser powder bed fusion of JIS SKD61 tool steel is systematically optimized using a Taguchi design and ANOVA. Hatch spacing and layer thickness are identified as dominant parameters controlling surface roughness and tensile strength. Subsequent tempering at 600°C improves microstructural stability and mechanical performance, enabling high‐density SKD61
Masrurotin Masrurotin, Andi Ard Maidhah, Maziar Ramezani, Wojciech Macek, Cho‐Pei Jiang   +4 more
wiley   +1 more source

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On the geometric-arithmetic Estrada index of graphs

Applied Mathematics and Computation, 2021
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yingui Pan
exaly   +4 more sources

A new geometric–arithmetic index

Journal of Mathematical Chemistry, 2009
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ivan Gutman, Boris Furtula
exaly   +3 more sources

On geometric-arithmetic index

Journal of Mathematical Chemistry, 2009
The geometric-arithmetic (GA) index is a newly proposed graph invariant in mathematical chemistry. We give the lower and upper bounds for GA index of molecular graphs using the numbers of vertices and edges. We also determine the n-vertex molecular trees with the minimum, the second and the third minimum, as well as the second and the third maximum GA ...
Bo Zhou, Yan Yuan, Nenad Trinajstić
exaly   +3 more sources

The Geometric–Arithmetic index of trees with a given total domination number

Discrete Applied Mathematics
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Fateme Movahedi, Roslan Hasni, Sérgio Bermudo Navarrete   +2 more
exaly   +3 more sources

Some Properties of the Arithmetic–Geometric Index [PDF]

Symmetry, 2021
Recently, the arithmetic–geometric index (AG) was introduced, inspired by the well-known and studied geometric–arithmetic index (GA). In this work, we obtain new bounds on the arithmetic–geometric index, improving upon some already known bounds.
José M Sigarreta, Edil D Molina, José M Rodríguez   +2 more
exaly   +2 more sources

Computational properties of the arithmetic–geometric index

Journal of Mathematical Chemistry, 2022
The concept of arithmetic-geometric index was introduced in the chemical graph theory recently, but it has shown to be useful. We obtain in this paper new lower bounds of the arithmetic-geometric index and we characterize graphs extremal with respect to ...
Ana Portilla, Domingo de Guzman Pestana, W Carballosa   +2 more
exaly   +2 more sources

Bounds on the Arithmetic-Geometric Index [PDF]

Symmetry, 2021
The concept of arithmetic-geometric index was recently introduced in chemical graph theory, but it has proven to be useful from both a theoretical and practical point of view.
José M Sigarreta, José M Rodríguez, José M Sigarreta   +2 more
exaly   +2 more sources

On exponential geometric-arithmetic index of graphs

Journal of Mathematical Chemistry, 2023
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Das, Kinkar Chandra, Mondal, Sourav
openaire   +2 more sources