Electronics Incorporated - The Shot Peener - Shot Peening Library
Title: Effect Of Fine Particle Bombarding On Thermal Fatigue Property Of Tool Steel For Die Casting
Author: S Takagi, M Kumagai, T Satsuta, A Sano, E Shimodai
Source: Conf Proc: ICSP-10 Tokyo, Japan 2008
Publication year 2008
Document number: 2008075
Number of pages: 5
Abstract:
ABSTRACT
Effect of the fine particle bombarding (FPB) process, which makes particles of several tens microns in diameter impact at high speed, on the thermal fatigue property of the
tool steel for die casting (JIS-SKD61) was investigated. FPB processed specimens exhibited superior thermal fatigue properties as compared with that of not processed
specimen. i.e. both a number and depth of heat cracks obviously decreased in the FPB processed specimens after the thermal fatigue test that the surface temperature of the
specimens was gone up to 843K and down to 373K cyclically for 2,000 times. TEM observation revealed that nanocrystalline structure was produced near the surface of specimen
by FPB process and that serious grain coarsening did not occur in the nanocrystalline structure even after annealing at 843K. Therefore it is considered that grain
refinement by FPB process contributed to prevent initiation and grows of heat cracks.
KEY WORDS heat crack, nanocrystalline structure, severe plastic deformation
This ICSP paper is not available until September of 2011. You may purchase the complete conference procedings ICSP-10 for $230 at Electronics Inc +1-574-256-5001
www.shotpeener.com
This page last revised: 03/22/2010