Mechanical Surface Treatments on the High-Strength Alpha-Titanium Alloy KS 120

Author:  Kiese, Zhang, Schauerte and Wagner
Source:  Conf Proc: ICSP-8 Sept. 16-20, 2002 Garmisch-Partenkirchen, Germany
Doc ID:  2002052
Year of Publication:  2002
Authors Jurgen Kiese 1), Jiulai Zhang 2), Oliver Schauerte 1) and Lothar Wagner 2) 1) Volkswagen AG, Wolfsburg, Germany 2) Chair of Physical Metallurgy and Materials Technology, Technical University of Brandenburg at Cottbus, Cottbus, Germany Abstract The a titanium alloy KS 120 was specifically developed by Kobe Steel, Japan to possess a fine grained microstructure resulting in high yield stress - high tensile ductility combinations and excellent HCF performance. In the present investigation, shot peening and roller-burnishing were performed to determine to what extent the HCF life of KS 120 can be further improved by mechanical surface treatments. While both shot peening and roller-burnishing increased the fatigue life of KS 120 by roughly one order of magnitude, the 10 7 cycles fatigue strength of the electro-polished reference was not improved.

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