Results 21 to 30 of about 137,790 (334)

Microstructure Evolution and Fracture Mechanism of 55NiCrMoV7 Hot-Working Die Steel during High-Temperature Tensile

Metals, 2023
In this paper, through high-temperature tensile tests of 55NiCrMoV7 steel, high-temperature fracture behavior, microstructure evolution, and carbide distribution characteristics of both the thermal–mechanical coupling zone (fracture zone) and thermal ...
Yasha Yuan, Wenyan Wang, Ruxing Shi, Yudong Zhang, Jingpei Xie   +4 more
doaj   +1 more source

Effect of ball-milling process in combination with the addition of carbide microparticles on the microstructure and wear resistance of a Co–Cr–W alloy prepared by powder metallurgy method

Materials Research Express, 2021
Co–Cr–W alloys were widely used in the inlet exhaust valve of aeroengine. However, the traditional manufacturing process of Co–Cr–W alloys can not meet the demand for higher comprehensive performance, and an optimum method needs to be developed.
S Y Wang, X Y Hou, L Wang, H Y Zhang, W B Zhang, Y P Xia, Y Sun, Y Z Zhou   +7 more
doaj   +1 more source

Aging Phenomena during In-Service Creep Exposure of Heat-Resistant Steels

Metals, 2019
An investigation of aging phenomena during creep exposure has been conducted for HP-Nb cast reformer tubes for several exposure conditions. Aging was manifested by carbide precipitation, carbide coarsening, and carbide transformation.
G. N. Haidemenopoulos, K. Polychronopoulou, A. D. Zervaki, H. Kamoutsi, S. I. Alkhoori, S. Jaffar, P. Cho, H. Mavros   +7 more
doaj   +1 more source

Improving the Wear Resistance of Ledeburitic Tool Steels by a Combination of Semi-Solid and Cryogenic Processing

Metals, 2022
Ledeburitic tool steel X210Cr12 was processed by passing through a semi-solid state with subsequent forming on a hydraulic press, thus achieving a fine-grained martensitic matrix, uniformly dispersed fine precipitates, and removal of sharp-edged primary ...
Hana Jirková, Kateřina Rubešová, Štěpán Jeníček, David Hradil, Ludmila Kučerová   +4 more
doaj   +1 more source

Novel Morphology for NiWMo Carbides Obtained by Mechanical Alloying and Quenching [PDF]

C
In the present work, the synthesis and decomposition of low-dimensional materials from a Ni15Mo25W10C50 system produced by mechanical alloying was reported.
Jesús Noé Rivera Olvera, Luis Gerardo Hernández-Maya, Lucia Díaz-Barriga Arceo   +2 more
openalex   +3 more sources

Effect of Heat Treatment Schedules on Creep Performance of Ni-Based Superalloy Mar-M247 at 871 °C and 250 Mpa

Metals, 2023
The effects of heat treatment (H1 and H2) on the creep behavior and microstructures of Mar-M247 at 871 °C/250 MPa are studied. The results show that the as-cast microstructure is composed of eutectics, γ phase, γ’ phase, MC and M23C6 carbides, while new ...
Qinghai Pan, Yongfeng Sui, Peijiong Yu, Xinbao Zhao, Yuan Cheng, Quanzhao Yue, Yuefeng Gu, Ze Zhang   +7 more
doaj   +1 more source

Effect of Microstructure on Hydrogen Permeation in EA4T and 30CrNiMoV12 Railway Axle Steels

Metals, 2019
A comparative study was conducted to reveal the effect of microstructure on hydrogen permeation in the EA4T and 30CrNiMoV12 railway axle steels. Unlike the EA4T with its sorbite structure, 30CrNiMoV12 steel shows a typical tempered martensitic structure,
Tingzhi Si, Yunpeng Liu, Qingan Zhang, Dongming Liu, Yongtao Li   +4 more
doaj   +1 more source

Ultra-High Temperature Ceramics for solar receivers: spectral and high-temperature emittance characterization [PDF]

Journal of the European Optical Society-Rapid Publications, 2012
We report on the preparation, room temperature spectral reflectance and high-temperature thermal emittance characterization of different boride and carbide Ultra-High Temperature Ceramics (UHTCs).
Sani E., Mercatelli L., Jafrancesco D., Sans J. L., Sciti D.   +4 more
doaj   +1 more source

Effect of cerium on the primary carbides and inclusions in electroslag remelted M35 high speed steel

Journal of Materials Research and Technology, 2023
To restrain the formation of primary carbides in M35 high speed steel, the present work investigated the effect of cerium on the microstructure, primary carbides and inclusions in electroslag remelted M35 high speed steel based on experimental ...
Dingli Zheng, Guojun Ma, Jing Li, Jung-wook Cho, Zhang Xiang, Mengke Liu, Junlin Zhu   +6 more
doaj   +1 more source

Research status and development trend of new nanocrystalline cemented carbides

Fenmo yejin jishu, 2022
Nanocrystalline cemented carbides have been widely used in the electronics information, automobile manufacturing, aerospace, national defense, and military industry due to the excellent performance. The development of nanocrystalline cemented carbides in
WANG Qian-yu, QIN Ming-li, WU Hao-yang, JIA Bao-rui, QU Xuan-hui   +4 more
doaj   +1 more source