Increasing the fatigue strength of parts by ultrasonic surface treatment

1981 ◽  
Vol 13 (1) ◽  
pp. 76-81 ◽  
Author(s):  
A. V. Kulemin ◽  
V. V. Kononov ◽  
I. A. Stebel'kov
Keyword(s):  
Fatigue Strength ◽  
Surface Treatment ◽  
Ultrasonic Surface Treatment

Effect of electropulsing-ultrasonic surface treatment on the surface properties and the corrosion behavior of 45 steel

2016 ◽  
Vol 31 (14) ◽  
pp. 2114-2124 ◽  
Author(s):  
Bing Zhang ◽  
Haibo Wang ◽  
Shuo Zhang ◽  
Guolin Song ◽  
Song-Zhu Kure-Chu ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Surface Properties ◽  
Corrosion Behavior ◽  
Image Position ◽  
Ultrasonic Surface Treatment

Abstract

scholarly journals Investigation of the effect of ultrasonic surface treatment before ion implantation on the structure of the surface layer of aluminum alloy 1201

2020 ◽  
Vol 315 ◽  
pp. 05002
Author(s):  
Viktor Ovchinnikov ◽  
Irina Kurbatova ◽  
Nadezda Uchevatkina
Keyword(s):  
Grain Size ◽  
Surface Layer ◽  
Aluminum Alloy ◽  
Ion Implantation ◽  
Cathode Material ◽  
Surface Treatment ◽  
Ultrasonic Treatment ◽  
Nanocrystalline Structure ◽  
Depth Of Penetration ◽  
Ultrasonic Surface Treatment

The aim of this study was to study the properties of 1201 aluminum alloy after ultrasonic treatment and their evolution during subsequent ion implantation using the monotectic Cu-Pb alloy as the cathode material of the implant. It is shown that during ultrasonic treatment the surface layer of aluminum alloy 1201 undergoes significant changes. A nanocrystalline structure with a grain size of less than 200 microns is formed in it. Ultrasonic treatment of the surface of the target from alloy 1201 before implantation leads to a decrease in the depth of penetration of ions to 160–180 nm and the appearance of amorphization in the implanted layer.

scholarly journals Fatigue Strength Enhancement of Butt Welds by Means of Shot Peening and Clean Blasting

Metals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 744 ◽  
Author(s):  
Jonas Hensel ◽  
Hamdollah Eslami ◽  
Thomas Nitschke-Pagel ◽  
Klaus Dilger
Keyword(s):  
Aluminum Alloy ◽  
Fatigue Strength ◽  
Surface Treatment ◽  
Shot Peening ◽  
Surface Preparation ◽  
High Strength ◽  
Butt Welds ◽  
Strength Enhancement ◽  
Lack Of Control ◽  
Mechanical Surface

Shot peening is a mechanical surface treatment to improve the fatigue strength of metallic components. Similarities exist between regular shot peening and conventional industrial clean blasting. However, the main difference between these two processes is the peening media used and the lack of control and documentation of peening parameters. The clean blasting process is not yet qualified to optimize fatigue enhancement, although it holds a similar potential to regular shot peening. Clean blasting is frequently applied to welded components, with the purpose of surface preparation for application of corrosion protection. This article presents the results of regular shot peened double V-groove (DV) butt welds made from construction steels S355N and S960QL, as well as the high strength aluminum alloy Al-6082. The peening parameters are varied widely. Furthermore, the effect of coverage and intensity is investigated to test the robustness of the peening processes. The data is completed with industrially clean blasted welds, representing typical workshop conditions. The overall objective of this work is to derive minimum peening parameters that still allow significant fatigue strength benefits. The presented data show a high robustness of the fatigue results to peening parameters.

Effect of Surface Treatment on Fatigue Strength of SCM440H

2013 ◽  
Vol 30 (8) ◽  
pp. 779-784 ◽  
Author(s):  
Hyunho Yeom ◽  
Moon Gu Lee ◽  
Choon Man Lee ◽  
Yongho Jeon
Keyword(s):  
Fatigue Strength ◽  
Surface Treatment ◽  
Effect Of Surface

Effect of hybrid surface treatment composed of nitriding and DLC coating on friction-wear properties and fatigue strength of alloy steel

2016 ◽  
Vol 661 ◽  
pp. 105-114 ◽  
Author(s):  
Tatsuro Morita ◽  
Kenta Inoue ◽  
Xiaoteng Ding ◽  
Yoshitaka Usui ◽  
Masaru Ikenaga
Keyword(s):  
Fatigue Strength ◽  
Surface Treatment ◽  
Alloy Steel ◽  
Wear Properties ◽  
Dlc Coating

scholarly journals Effect of Laser Preheating AISI 4140 Specimens for Micro-Forging

2017 ◽  
Vol 62 (2) ◽  
pp. 1209-1213
Author(s):  
C. Jung ◽  
M.G. Lee ◽  
Y. Jeon
Keyword(s):  
Heat Treatment ◽  
Fatigue Life ◽  
Fatigue Strength ◽  
Surface Treatment ◽  
Laser Heat Treatment ◽  
Forging Process ◽  
Advantages And Disadvantages ◽  
Treatment Processes ◽  
Laser Heat ◽  
Aisi 4140

Abstract Many high performance and permanent service parts require suitable material characteristics-high fatigue strength is one of the most important characteristics. For this reason, surface treatment processes are essential to increase the material performance and avoid the use of costly ineffective material. There exist various surface treatment processes for various applications. Each process has advantages and disadvantages and hybridization can solve various problems. The micro-forging process delivers a controlled and uniform surface hardness, but the depth of the forged surface is limited. On the other hand, laser heat treatment can increase the hardness drastically, but the surface may become brittle, which reduces the fatigue life. Laser-assisted micro-forging is a novel hybrid process of laser heat treatment and micro-forging that has the potential to increase the forging depth and relax the stress caused by the high temperature of the forging process. This study examines the effect of laser preheating in the micro-forging of AISI 4140. The processes were varied as follows: no treatment, micro-forging only, and laser-assisted micro-forging. The fatigue strength of the specimens was examined by means of an ultrasonic fatigue tester and then compared. The microstructural changes were investigated with respect to the processes by using scanning electron microscopy. In conclusion, it was confirmed that the laser preheating auxiliary forging affects the fatigue life. It was confirmed that the fatigue life was the mostly increased in 550°C temperature laser preheating micro forging process and the temperature was identified as the most important factor.

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