Results 31 to 40 of about 4,788 (225)

Development and Design and Heat Treatment of Production, Storage and Mine Drilling Pipes in Petroleum and Geothermal Industries

open access: yesDüzce Üniversitesi Bilim ve Teknoloji Dergisi, 2020
In this study, sequential anddifferent temperature heat treatments were applied to steels after austenatingheat treatment applied to different AISI steel types.
İsmail Topcu   +3 more
doaj   +1 more source

Microstructural Characterization Of Laser Heat Treated AISI 4140 Steel With Improved Fatigue Behavior

open access: yesArchives of Metallurgy and Materials, 2015
The influence of surface heat treatment using laser radiation on the fatigue strength and corresponding microstructural evolution of AISI 4140 alloy steel was investigated in this research.
Oh M.C., Yeom H., Jeon Y., Ahn B.
doaj   +1 more source

The Residual Stress Relaxation Behavior of Weldments During Cyclic Loading [PDF]

open access: yes, 2013
Accurate measurement of residual stress is necessary to obtain reliable predictions of fatigue lifetime and enable estimation of time-to-facture for any given stress level.
A. Wick   +38 more
core   +3 more sources

Effect of austempering conditions on the microstructure and mechanical properties of AISI 4340 and AISI 4140 steels

open access: yesJournal of Materials Research and Technology, 2019
AISI 4340 and AISI 4140 are normally used for different structural applications in quenched and tempered state due to their high strength, high abrasion and fatigue resistance but they lack toughness. Presence of dual phase microstructure such as ferrite-
Mian Muhammad Bilal   +6 more
doaj   +1 more source

Pengaruh Proses Bubut Baja AISI 4140 terhadap Mental Workload dengan Metode NASA-TLX

open access: yesRekayasa Mesin, 2021
This study aims to analyze the mental workload with the experimental method when operating a lathe under two different conditions, namely by using cooling and without cooling.
Meri Rahmi   +2 more
doaj   +1 more source

On the comparative cutting performance of nature inspired structured cutting tool in dry cutting of AISI/SAE 4140 [PDF]

open access: yes, 2015
In this study, femtosecond laser was used to create micro-structures on the flank face of a cutting tool. For the first time, a nature-inspired design (shape) of structure was created and explored.
Anis Fatima, Han X, Paul T Mativenga
core   +1 more source

Surface Improvement of Shafts by Turn-Assisted Deep Cold Rolling Process

open access: yesMATEC Web of Conferences, 2016
It is well recognized that mechanical surface enhancement methods can significantly improve the characteristics of highly-stressed metallic components.
Prabhu Raghavendra   +4 more
doaj   +1 more source

The effect of process parameters on microstructure and corrosion behavior of AISI 4140 steel modified by pulse plasma treatment

open access: yesJournal of Electrochemical Science and Engineering, 2022
The pulse plasma system is a surface modification method applied to steel samples. In the present study, the effect of the nozzle distance and pulse number parameters were investigated on the modification process.
Yıldız Yaralı Özbek   +1 more
doaj   +1 more source

Pressed and sintered AISI 4140 PM low alloy steel from gas atomised powders [PDF]

open access: yes, 2013
This paper is based on a presentation at Euro PM 2012 organised by EPMA in Basel, Switzerland on 16–19 September 2012In conventional PM of low alloy steels various alloying routes are used (fully prealloyed powders, diffusion alloying, elemental powders),
Jabbari Taleghani, Mohammad Ali   +2 more
core   +2 more sources

NUMERICAL AND EXPERIMENTAL ANALYSIS OF RESIDUAL STRESSES GENERATED DURING HARDENING OFAISI 4140 BAR [PDF]

open access: yesTecnologia em Metalurgia, Materiais e Mineração, 2012
The aim of this work is to analyze the distribution of residual stresses resulting from the combination of volumetric changes due to heat gradients and phase changes occurring during the quenching process of an AISI/SAE 4140 steel cylinder.
Edwan Anderson Ariza Echeverri   +1 more
doaj   +1 more source

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