Results 1 to 10 of about 7,727 (164)

Microhardness Distribution of Long Magnesium Block Processed through Powder Metallurgy

open access: yesJournal of Manufacturing and Materials Processing, 2022
Powder metallurgy is a popular method of making raw powders into specific shaped samples. However, the pressure distribution and the microhardness difference within the sample are nonnegligible and unclear when the sample is long or exceeds a specific ...
Jiaying Wang, Qizhen Li
doaj   +2 more sources

Measurement and Analysis of Hydrogen Distribution in Stress Environment Using Vickers Microhardness Technique [PDF]

open access: yesAdvances in Materials Science and Engineering, 2018
In this paper, the stress distribution field in front of the crack tip was obtained by loading a modified WOL specimen using a bolt. Considering the relationship between microhardness and hydrogen content or internal stress in the metal, a model based on
Lei Gu   +3 more
doaj   +2 more sources

The Microhardness as an Express Method for Estimation the Depth of Metal Particle Distribution

open access: yesEurasian Chemico-Technological Journal, 2004
By measurement of microhardness of silver layer on polyimide films and its reduction after removing the stress, the depth of silver distribution in the polyimide films was calculated.
L. L. Muhina   +4 more
doaj   +2 more sources

The Influence of High-Pressure Torsion on the Free Volume and Shear-Band Formation during the Indentation of Vit105 Metallic Glass

open access: yesMetals, 2022
The research on structural features, microhardness distribution, and deformation features of Vit105 bulk metallic glass (BMG) before and after high-pressure torsion (HPT), as well as after relaxing annealing, has been carried out.
Vasily Astanin   +3 more
doaj   +2 more sources

Justification of the method of surface plastic deformation to strengthen the surface of the shaft under the cuff during repair [PDF]

open access: yesE3S Web of Conferences, 2023
The shaft-seal connection is a critical element of any unit, and its reliability is important to ensure the service life of the entire assembly unit. Treatment by surface plastic deformation makes it possible to provide hardening to a depth of up to 2 mm,
Nesterkin Gennady   +4 more
doaj   +1 more source

Analysis of residual stress in 1.4539 austenitic steel joints welded with TIG method [PDF]

open access: yesBiuletyn Wojskowej Akademii Technicznej, 2019
The article compares the results of tests of residual stress determined based on Knoop microhardness measurements and obtained experimentally with the use of an x-ray diffractometer.
Barbara Nasiłowska   +4 more
doaj   +1 more source

Effects of process parameters and carbon nanotubes content on microstructure and properties of laser cladding composite coatings using Ni-Ti-Cr-carbon nanotubes

open access: yesMaterials Research Express, 2022
The Ni-Ti-Cr-carbon nanotubes (CNTs) composite coatings was successfully fabricated by laser cladding. The optical microscope was used to observe the metallographic structure of the composite coating, the phase composition of the composite layer was ...
Kexin Zhou, Yifu Shen
doaj   +1 more source

Microstructural evolution and surface integrity of ultrasonic surface rolling in Ti6Al4V alloy

open access: yesJournal of Materials Research and Technology, 2021
Ultrasonic surface rolling technology is a new mechanical surface treatment technology that can improve the surface integrity, increase the amplitude and depth of the residual compressive stress layer and improve the fatigue property of metal materials ...
Xian Luo   +4 more
doaj   +1 more source

A new approach to predict microhardness of two-phase in cutting S32760 duplex stainless steel

open access: yesScientific Reports, 2023
The uneven distribution of microhardness in the two-phase structure of S32760 duplex stainless steel after cutting is attributed to variations in the crystal structure, which significantly impact the material's performance.
Xiangyuan Zhang   +5 more
doaj   +1 more source

Influence of cerium content on the microstructure and thermal expansion properties of suction cast Al-Cu-Fe alloys

open access: yesRoyal Society Open Science, 2021
Low-expansion alloys are of great importance and can be used for the development of new aerospace materials. Herein, we report diverse rare earth quasicrystal alloys fabricated by the vacuum suction casting process. The effects of the addition of cerium (
Juan Wang   +9 more
doaj   +1 more source

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