Shot Peening - A New Method for Improving Mechanical Properties of Structural Ceramics

Abstract:

Article Preview

Shot peening is commonly used to modify material surface layers and improve the strength of metal components. As it occurred the same technique can be applied for brittle ceramics. High compressive stresses up to 2.4 GPa were introduced into near surface region of alumina and zirconia ceramics by ultrasonic shot peening maintaining its surface integrity. Dependence between diameter of tungsten balls, treatment time (at constant mass of balls in the housing and vibration amplitude) and level of compressive stress introduced was determined for both ceramics with nano and micrograins. Coarser grained ceramics was found to be more sensible to structural changes responsible for stress creation than the smaller one. High microplastic deformation in shot peened surface layer of ceramics was observed by X-ray diffraction. An increase of hardness and surface resistance to fracture with increasing level of compressive stress was found.

Info:

Periodical:

Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara

Pages:

277-280

DOI:

10.4028/www.scientific.net/KEM.317-318.277

Citation:

H. Tomaszewski et al., "Shot Peening - A New Method for Improving Mechanical Properties of Structural Ceramics", Key Engineering Materials, Vols. 317-318, pp. 277-280, 2006

Online since:

August 2006

Export:

Price:

$35.00

[1] W. Pfeiffer and T. Frey, Strengthening of ceramics by shot peening, Materials Science Forum, Vols 404-407 (2002) pp.101-108.

DOI: 10.4028/www.scientific.net/msf.404-407.101

[2] B.R. Lawn, A.G. Evans and D.B. Marshall, Elastic/plastic indentation damage in ceramics: The median/radial crack system, J. Amer. Ceram. Soc., 63 [9-10] 91980) 574-81.

[3] G.R. Anstis, P. Chantikul, B.R. Lawn and D.B. Marshall, A critical evaluation of indentation techniques for measuring fracture toughness: Direct crack measurements, J. Amer. Ceram. Soc., 64.

DOI: 10.1111/j.1151-2916.1981.tb10320.x

[9] (1981) 533-43.

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