Crack Paths 2009

There is a systematic decrease in depth of fatigue part of fracture surface in shot blasted

and as forged components independently. No such consistency is observed when as

forged and shot blasted components are compared.

In order to study the influence of crack initiation and propagation on life time, further

tests designed based on crack initiation are needed.

In order to study the reasons for such difference in fatigue part of fracture surfaces, a

thorough investigation on small fatigue specimens tested in similar condition with full

component test is in progress.

A K N O W L E D G M E N T

The paper is published with permission of Volvo AB. Financial support was given by

Swedish Agency for Innovation Systems (VINNOVA).

R E F E R E N C E S

Moor, H.F. Shot peening and the fatigue of metals,(1944).

1.

2.

Felgar, R.P. American Society of Mechanical Engineers, (1958).

3. Webster, G.A.E., International Journal of Fatigue ,(2001). 23, supplement, pp.

S375-S383.

4. Torres, M.A.S. H.J.C.V., International Journal of Fatigue,(2002), 24: p. 877

886.

5. Schulze,V. Modern Mechanical Surface Treatment, State, Stability, Effetcs.

(2006). W I L E Y - V CVeHrlag G m b H& Co.,Germany.

6. Rice, R.C. Ed., Fatigue Design Handbook, 2nd ed., (1988), No. AE-10, Society

of Automotive Engineers,

7. Dowling, N.E. Mechanical Behaviour of Materials, (2007), M.J.Horton, Ed.,

USA.

11

243