Results 31 to 40 of about 999,147 (302)

Evidence in practice-number 8:What is the prognosis of optic neuritis? How often does it lead to multiple sclerosis? [PDF]

open access: yes, 2005
Gearing components are an example for widely used machining parts in engines. Nowadays the development and optimization of materials and process chains are driven towards a concurrent improvement of final product properties and production efficiency ...
Sanders, Sharon   +5 more
core   +1 more source

A path generation method for wire and arc additive remanufacturing of complex hot forging dies

open access: yesThe International Journal of Advanced Manufacturing Technology, 2021
Wire and arc additive remanufacturing (WAAR) technology has become a new solution for hot forging dies repair and remanufacturing. In this study, a path generation method is proposed for WAAR of hot forging dies.
Yonghua Shen, Yanhong Wei, Renpei Liu
semanticscholar   +1 more source

Prediction of Mean Grain Size Evolution during the Forging of IN718 Turbine Disc

open access: yesMATEC Web of Conferences, 2016
The microstructure evolution during the cogging, upsetting and hot die forging in the manufacture of IN718 turbine disc has been predicted through coupling the microstructure evolution prediction system developed with a commercial finite element software.
Haiyan Zhang, Shihong Zhang, Ming Cheng
doaj   +1 more source

A study of thermomechanical behaviour and grain size evolution of AA7050 under hot forging conditions

open access: yesInternational Journal of Lightweight Materials and Manufacture, 2019
A series of compression tests have been carried out using Gleeble (3800) thermomechanical simulator to investigate the viscoplastic behaviour of AA7050 as well as its microstructural characteristics under hot forging conditions.
Weishu Li   +6 more
doaj   +1 more source

Some Manifestations of Antioxidation Coating for Hot Precision Forging Gears

open access: yesAdvances in Materials Science and Engineering, 2019
A high temperature protective coating was prepared onto the surface of 20CrMnTi steel by brushing technique, and the heated billet was subjected to hot forging.
Dongcheng Li   +4 more
doaj   +1 more source

(Poly)Borylated Species as Modern Reactive Groups toward Unusual Synthetic Applications

open access: yesAngewandte Chemie, EarlyView.
In this review, we spotlight recent breakthroughs in α‐polyboron‐substituted carbon‐centered intermediates (carbanion, carbocation, radical, and carbene) and polyborylated alkenes. By bridging fundamental reactivity with the application potential of these extraordinary species, we hope this review will serve as a roadmap for harnessing these unique ...
Nadim Eghbarieh   +5 more
wiley   +2 more sources

Hot deformation behavior of Cr-Co-Mo-Ni gear steel and finite element simulation of the die forging process

open access: yes工程科学学报, 2016
Large strain isothermal compression tests were carried out on a Gleeble-3800 thermal simulator to study the high temperature deformation behavior of Cr-Co-Mo-Ni gear steel.
TANG Hai-yan   +3 more
doaj   +1 more source

Simulation and experimental study on microstructure evolution of 5CrNiMoV steel during multi-directional non-isothermal forging

open access: yesMaterials Research Express, 2020
Microstructure evolution during the hot forming shows a significant impact on material’s mechanical properties. To explore the deformation characteristics of 5CrNiMoV steel, numerical simulation and microscopic phase-field simulation of the multi ...
Zhiqiang Hu, Kaikun Wang, Li Yang
doaj   +1 more source

Flow stress and hot deformation activation energy of 6082 aluminium alloy influenced by initial structural state [PDF]

open access: yes, 2019
Stress-strain curves of the EN AW 6082 aluminium alloy with 1.2 Si-0.51 Mg-0.75 Mn (wt.%) were determined by the uniaxial compression tests at temperatures of 450-550 degrees C with a strain rate of 0.5-10 s(-1).
Kawulok, Petr   +5 more
core   +1 more source

Evaluation of cracking risk of 80MnSi8-6 nanobainitic steel during hot forging in the range of lower temperature limits

open access: yesMaterials Science
Nanobainitic steels exhibit an exceptional combination of high strength, good plasticity, impact toughness, and wear resistance. They are suitable for the production of large mass components through the open-die forging process.
P. Lisiecka-Graca   +3 more
semanticscholar   +1 more source

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