Modification of Alumina Ceramics Properties by Stressonic® Shot Peening

Abstract:

Article Preview

Modification of material surface layers by conventional shot peening is commonly used to improve the strength of metal components. As it occurred high compressive stresses up to 2.0 GPa may be introduced also to near surface region of alumina ceramics by this technique. Two alumina ceramics were given to ultrasonic shot peening which is a new, compact and small consuming of shot media method developed by Sonats company. This process is named Stressonic®. The dependence between diameter of tungsten balls, treatment time (at constant mass of balls in the housing and vibration amplitude) and level of compressive stresses introduced was determined. High microplastic deformation in shot peened surface layer of alumina was observed by X-ray diffraction. An increase of surface resistance to fracture of ceramics with increasing level of compressive stresses was also found.

Info:

Periodical:

Materials Science Forum (Volumes 490-491)

Edited by:

Sabine Denis, Takao Hanabusa, Bob Baoping He, Eric Mittemeijer, JunMa Nan, Ismail Cevdet Noyan, Berthold Scholtes, Keisuke Tanaka, KeWei Xu

Pages:

509-514

DOI:

10.4028/www.scientific.net/MSF.490-491.509

Citation:

H. Tomaszewski et al., "Modification of Alumina Ceramics Properties by Stressonic® Shot Peening", Materials Science Forum, Vols. 490-491, pp. 509-514, 2005

Online since:

July 2005

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.