Shot Peening and Roller-Burnishing to Improve Fatigue Resistance of the (α+β) Titanium Alloy Ti-6Al-4V

Shot Peening ◽  
2006 ◽  
pp. 461-467 ◽  
Author(s):  
Marcin Kocan ◽  
Alfred Ostertag ◽  
Lothar Wagner
Keyword(s):  
Titanium Alloy ◽  
Fatigue Resistance ◽  
Shot Peening ◽  
Roller Burnishing ◽  
Improve Fatigue

Postcarburizing Mechanical Treatments

Carburizing ◽  
1999 ◽  
pp. 199-225
Keyword(s):  
High Temperature ◽  
Stress State ◽  
Fatigue Resistance ◽  
Internal Oxidation ◽  
Shot Peening ◽  
Transformation Products ◽  
Roller Burnishing ◽  
Temperature Transformation ◽  
And Behaviors

Abstract Mechanical treatments such as grinding and shot peening are often employed in the production of case-carburized parts. Grinding, besides restoring precision, removes carbide films, internal oxidation, and high-temperature transformation products. Shot peening strengthens component surfaces and induces a stress state that increases fatigue resistance. This chapter describes both processes as well as roller burnishing. It explains how these treatments are applied and how they influence the microstructure, properties, and behaviors of case-hardened components. It also addresses process challenges, particularly in regard to grinding.

Cut-Off Value of Detail Fatigue Rated Strength of TC4 Titanium Alloy with Compound Strengthening Treatment by Laser Shock Peening and Shot Peening

2020 ◽  
Vol 47 (5) ◽  
pp. 0502006
Author(s):  
刘亚鹏 Liu Yapeng ◽  
史志俊 Shi Zhijun ◽  
赵一昭 Zhao Yizhao ◽  
朱亮 Zhu Liang ◽  
刘马宝 Liu Mabao
Keyword(s):  
Titanium Alloy ◽  
Shot Peening ◽  
Laser Shock Peening ◽  
Laser Shock ◽  
Tc4 Titanium Alloy ◽  
Shock Peening

Influence of Mechanical Surface Treatments on the Fatigue Performance of the Gamma TiAl Alloy Ti-45Al-9Nb-0.2C

2007 ◽  
Vol 539-543 ◽  
pp. 1553-1558 ◽  
Author(s):  
Janny Lindemann ◽  
Anja Kutzsche ◽  
Michael Oehring ◽  
Fritz Appel
Keyword(s):  
Surface Roughness ◽  
Shot Peening ◽  
Tial Alloy ◽  
Elevated Temperatures ◽  
Lower Surface ◽  
Fatigue Performance ◽  
Ambient Temperatures ◽  
Roller Burnishing ◽  
Compressive Stresses ◽  
Wide Range

The effect of shot peening and roller burnishing on the fatigue performance of the γ(TiAl) alloy Ti-45Al-9Nb-0.2C was investigated over a wide range of processing intensities. At optimized conditions shot peening and roller burnishing can markedly improve the fatigue strength at ambient temperatures. For temperatures above 650 °C, the residual compressive stresses induced by shot peening and roller burnishing quickly relax. This indicates that, at elevated temperatures, surface roughness and dislocation strengthening become more important for the fatigue performance of mechanically surface-treated components. Roller burnishing leads to much lower surface roughness than shot peening, resulting in more effective improvement of high temperature fatigue performance. However, surface strengthening by shot peening can also be beneficial for the fatigue performance at elevated temperatures, when the surface roughness is reduced by subsequent polishing.

The Effect of Shot Peening on the Surface Topography and Fatigue Strength of Selected Sheets

2015 ◽  
Vol 818 ◽  
pp. 19-22
Author(s):  
Łukasz Bąk ◽  
Magdalena Bucior ◽  
Felix Stachowicz ◽  
Władysław Zielecki
Keyword(s):  
Fatigue Life ◽  
Fatigue Strength ◽  
Shot Peening ◽  
Experimental Tests ◽  
Special Treatment ◽  
Surface Layers ◽  
Impact Bending ◽  
Improve Fatigue Strength ◽  
Compressive Residual Stresses ◽  
Improve Fatigue

Numerous investigations have been performed in an attempt to improve fatigue strength of materials by creating compressive residual stresses in the surface layers as a result of the shot peening process. For example, during exploitation of the separating screener, some parts of screen sieve plate situated near the fixed edge undergo the largest deformation caused by impact bending and need special treatment. In this paper, the results of experimental tests are presented to analyse the effect of micro shot peening on surface layer characteristics and fatigue strength of steel sheet specimens. The effect of shot peening is more visible when fatigue life is taking into account. Thus, the use of shot peening of sheet surface made it possible to increase fatigue life of screener sieve.

Effect of Different Shot Peening Treatments on Fatigue Life in Ti Alloy

2018 ◽  
Vol 941 ◽  
pp. 908-913
Author(s):  
Yasunori Harada ◽  
Yuto Saeki ◽  
Katsuhiko Takahashi
Keyword(s):  
Titanium Alloy ◽  
Fatigue Life ◽  
Shot Peening ◽  
Work Hardening ◽  
Cast Steel ◽  
Average Diameter ◽  
Hardened Layer ◽  
Material Surface ◽  
Ultrasonic Shot Peening ◽  
The Media

The effects of peening conditions on the surface characteristics and fatigue life of titanium alloy was investigated using microshot peening, ultrasonic shot peening, and multiple shot peening. The use of microshot peening technology with minute media has become more widespread in consideration of the reduction of the notch effect in the material surface. The ultrasonic shot peening that uses media of several millimeters in size with ultrasonic vibration has attracted attention as a means to reduce the surface roughness. In the present study, an air-type and an ultrasonic type machine were used. In the microshot peening process, the media used was high-carbon cast steel and the hard powder, with an average diameter of 0.1 mm. The workpiece was commercial titanium alloy Ti-6Al-4V. In the microshot peening (MSP), work hardening was evident to the depth of approximately 0.3 mm from the surface. This depth was approximately three times the diameter of the media. However, the influence of the peening time on the hardness distribution was not great. In the ultrasonic shot peening (USP), work hardening was deeper in the material. This is because the diameter of the media used for ultrasonic machining was large. On the other hand, in the combined shot peening (CSP), a degree of hardness was higher at the top surface. However, the hardness patterns and values were pretty much identical to ultrasonic shot peening. The fatigue limit was thought to be greater in the microshot peening experiment because the work-hardened layer was formed near the workpiece surface.

Sign in / Sign up

Export Citation Format

Share Document