Results 31 to 40 of about 110,480 (216)

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

Possible signatures for tetraquarks from the decays of $$a_0(980)$$ a 0 ( 980 ) , $$a_0(1450)$$ a 0 ( 1450 )

European Physical Journal C: Particles and Fields, 2017
Based on the recent proposal for the tetraquarks with the mixing scheme, we investigate fall-apart decays of $$a_0(980), a_0(1450)$$ a 0 ( 980 ) , a 0 ( 1450 ) into two lowest-lying mesons.
K. S. Kim, Hungchong Kim
doaj   +1 more source

The a0(980) and f0(980) in the process Ds+→K+K−π+

Physics Letters B, 2021
In this work, we have investigated the process Ds+→K+K−π+, taking into account the contributions from the S-wave pseudoscalar-pseudoscalar interaction within the chiral unitary approach, and also the intermediate ϕ resonance.
Jun-Ya Wang, Man-Yu Duan, Guan-Ying Wang, De-Min Li, Li-Juan Liu, En Wang   +5 more
doaj   +1 more source

Robust Spot Melting by 3D Spot Arrangements in Electron Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
This work proposes an approach to replace separately melted contours for spot melting in electron beam powder fusion. Adapting the spot arrangements close to the contour combined with stacking yields a comparable surface quality without the inherent challenges of separate contours, as demonstrated, by electron optical images and roughness measurements.
Tobias Kupfer, Lukas Spano, Sebastian Pohl, Carolin Körner, Matthias Markl   +4 more
wiley   +1 more source

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source

Politics of the Periphery: An Introduction to Subnational Authoritarianism and Democratization in Latin America Política de la periferia. Una introducción a autoritarismo y democratización subnacional en América Latina

Journal of Politics in Latin America, 2010
The article is an introduction to the topic featured in JPLA 2/2010 "Subnational Authoritarianism and Democratization in Latin America." It discusses the papers by Carlos Gervasoni, Agustina Giraudy, Julián Durazo Herrmann, Alfred P.
Edward L. Gibson
doaj  

Calculation of the $$B\rightarrow K_{0,2}^*(1430)f_0(980)/\sigma $$ B→K0,2∗(1430)f0(980)/σ decays in the perturbative QCD approach

European Physical Journal C: Particles and Fields, 2019
Motivated by the observations of the decays $$B^0 \rightarrow K_0^{*}(1430)^0 f_0(980)$$ B0→K0∗(1430)0f0(980) and $$ B^0 \rightarrow K_2^{*}(1430)^0 f_0(980)$$ B0→K2∗(1430)0f0(980) from BaBar collaboration, we study the $$B^{0(+)} \rightarrow K_{0,2}^{*}(
Qi-Xin Li, Lei Yang, Zhi-Tian Zou, Ying Li, Xin Liu   +4 more
doaj   +1 more source

Influence of Si Content and Milling Duration on the Microstructure and Mechanical–Tribological Properties of AlCoCrFeNiSi High‐Entropy Alloys

Advanced Engineering Materials, EarlyView.
Si‐doped AlCoCrFeNi high‐entropy alloys are synthesized by mechanical alloying to reveal the effect of Si content and milling time on phase evolution, microstructural refinement, and tribological behavior. A transition from FCC to BCC structure, significant grain refinement, and enhanced hardness and wear resistance are achieved, with the 4 at% Si ...
Mustafa Okumuş, Mehmet Emin Demir, Sercan Özpınar   +2 more
wiley   +1 more source

Dissatisfaction with Democracy: Evidence from the Latinobarómetro 2005 Insatisfacción con la Democracia: Evidencia de Latinobarómetro 2005

Journal of Politics in Latin America, 2010
Data for 17 Latin American countries collected by Latinobarómetro 2005 reveal that dissatisfaction with democracy is a sign of progress. Political stability and increased governmental effectiveness enable the better-educated leftish young to express ...
Brian J. L. Berry, Osvaldo S. Tello Rodriguez   +1 more
doaj  

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source