Self-Peening of Titanium Alloys with Ti-Based Shot
Author: D. A. Brice and D. F. Bahr | Center for Surface Engineering & Enhancement School of Materials Engineering, Purdue University
Source: The Shot Peener magazine, Vol 33, Issue 4, Fall 2019
Doc ID: 2019042
Year of Publication: 2019
Abstract:
Introduction
Surface contamination from shot peening is a well accepted,
but less often reported, consequence of shot-based surface
modification processes. Residue from shot material on treated
surfaces has been reported to decrease corrosion performance
for Al, Fe and Mg alloys [1-3]. It would seem logical that
using shot media with a similar chemical composition to the
target material, i.e., self-peening, could be a possible solution
to minimize surface contamination incurred by shot peening.
Since Ti alloys are often used in corrosive environments (from
chemical processing to biomedical implants), offering a selfpeening
solution for these alloys may be particularly helpful
to assuage any fears about surface chemical contamination.
This study shows a new process to harden Ti powder
that can then be used as shot media for self-peening. The
performance of the Ti-shot was evaluated in regards to the
surface composition after shot peening and the residual stress
evolved from shot peening, and then compared to peening
with glass bead media.
| Download PDF |
---|