نتایج جستجو برای: metal melting industry

تعداد نتایج: 410660  

Journal: :Gender, Work & Organization 2020

ژورنال: طب کار 2022

Introduction: Lead is a toxic metal that is found in the earth's crust and has been used by humans since 7000 years ago due to its density, malleability, high resistance and low melting point. The wide use of this metal in the industry, in addition to the exposure of workers, has led to widespread environmental pollution and public health problems in many parts of the world. Due to the widespre...

Journal: :Journal of The Japanese Society for Food Science and Technology-nippon Shokuhin Kagaku Kogaku Kaishi 2022

In recent years, many companies and research institutes have been conducting on food 3D printers. The most commonly known printing method is the thermal melting lamination method, fused deposition modeling (FDM), in which plastic materials are melted then ejected from a nozzle. used this thermoplastic resins such as ABS PLA. order to print variety of materials, various types methods developed, ...

Surface roughness in the welding processes is one of the important parameters in the laser welded metal connections which affects laser beam absorption directly. When the laser beam is irradiated to the surface of the base metal, the surface roughness plays an important role in the amount of beam absorption and the amount of melting achieved and directly affects the penetration depth. The main ...

2012
Zhen Zhang Xueyun Zhang Xiaojin He Xiaoping Wang Yongli Mi

This article introduces an efficient, low cost, and clean (zero pollution) zone melting phosphorus purification technique. We have successfully removed arsenic from solid phosphorus by melting a narrow region and making the resulting liquid zone travel slowly through a relatively long ingot of phosphorus. This technique can reduce arsenic concentration in solid phosphorus from 100 ppm to 10 ppm...

2012
YASUSHI SHIBUTA TOSHIO SUZUKI Yasushi Shibuta

Submitted for the MAR09 Meeting of The American Physical Society Molecular dynamics study of the phase transition in the bcc metal nanoparticles YASUSHI SHIBUTA, TOSHIO SUZUKI, The University of Tokyo — The phase transition between liquid and solid phases in bcc metal nanoparticles was investigated using a molecular dynamics simulation. The nucleation from an undercooled liquid droplet was obse...

2016
T. Górecki T. Gorecki

The vacancy mechanism of the melting process is utilized as a starting point for deriving the formula for the difference of the heat capacity of the liquid and solid metal in the neighbourhood of the melting point. From these calculations it follows that the difference C,, C,, is the same for all the metals and equals 3.50 J g.atom-' K-'. This result is compared with the existing in the literat...

2016
Byeongchan Lee Geun Woo Lee

Liquid-liquid transitions under high pressure are found in many elemental materials, but the transitions are known to be associated with either sp-valent materials or f-valent rare-earth elements, in which the maximum or a negative slope in the melting line is readily suggestive of the transition. Here we find a liquid-liquid transition with a positive melting slope in transition metal Ti from ...

A. Halvaee M. Paidar M. Taheri S. F. Kashani-Bozorg

The weldability of GTD-111 nickel-based superalloy by pulsed Nd:YAG laser welding with an average power of 250 W was studied, and the microstructural evolution and cracking characteristics were also investigated. The solidification cracking of the fusion zone (FZ) and the intergranular liquation cracking in the heat affected zone (HAZ) were observed in the joint. Solidification cracking was cau...

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