Paper Title:
Characteristics of High Frequency Peening Methods and their Effects on the Fatigue Strength of Welded Details
  Abstract

Research has been initiated on the effects of high frequency peening methods on the fatigue strength. These methods combine an improvement of weld toe profile with an initiation of compressive residual stresses and surface hardening. The effects of two techniques, High Frequency Impact Treatment (HiFIT) and Ultrasonic Impact Treatemnt (UIT) are compared. Laser measurements of the weld seam prove that both methods increase the overall weld toe radii. Further, residual stress measurements verify the introduction of compressive residual stresses at least up to a depth of 1 mm. The values meet the yield strength combined with an increase of the surface hardness. These material mechanical effects cause an increased crack resistance. Crack detection methods prove that the material mechanical effects yield to a retarded crack initiation. Experimental results show that these effects lead to a significant increase of the fatigue strength and reduced slopes of the SN-curves.

  Info
Periodical
Key Engineering Materials (Volumes 348-349)
Edited by
J. Alfaiate, M.H. Aliabadi, M. Guagliano and L. Susmel
Pages
429-432
DOI
10.4028/www.scientific.net/KEM.348-349.429
Citation
I. Weich, T. Ummenhofer, "Characteristics of High Frequency Peening Methods and their Effects on the Fatigue Strength of Welded Details ", Key Engineering Materials, Vols. 348-349, pp. 429-432, 2007
Online since
September 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: X.J. Cao, Luo Peng Xu, Chong Wang, Jiang Jin, Qing Yuan Wang
Chapter 3: Advanced Materials on Very High Cycle Fatigue
Abstract:In order to investigate the effect of shot peening on the long life fatigue properties of Ti6Al4V (TC4), ultrasonic fatigue tests were...
81
Authors: Ivo Černý, Jiří Sís, Pavel Zháňal
Abstract:The paper contains results of fatigue resistance investigation of laser welded 10 mm thick sheets of a carbon structural S355 steel. High...
69
Authors: Ivo Černý, Jiří Sís
Abstract:The paper contains results of experimental programme aimed at evaluation of fatigue resistance of laser welded 6 mm and 10 mm thick sheets of...
82