An approach to calculate fatigue properties of laser cladded components

Investigations on Tailored Forming of AISI 52100 as Rolling Bearing Raceway

“…Regarding iron-based cladded components and their fatigue behavior under complex loads due to rolling contacts, few previous works exist. Koehler et al welded ASTM F75 powder (American Society for Testing and Materials standard for cobalt-28 chromium-6 molybdenum alloy; material number 2.4979) via deposition welding on AISI 4140 (American Iron and Steel Institute standard; 1.7225) and detected a reduced fatigue strength in 4-point bending tests compared to the mono-material, which could be explained by tensile residual stresses caused by the cladding process [6]. In further research by Koehler et al, fatigue tests were carried out on crankshafts of the same material combination repaired by deposition welding [7].…”

“…Forming is not only able to close pores; non-metallic inclusions are also pressed further into the depth of the surface, and thus out of the intended loaded functional area. This is also a desirable effect, as pores or defects directly below the surface are the most critical ones [6]. The macrographs depicted in Figure 5 show the effect of the die forging on the material distribution for the example of a bearing washer preform that is welded with a single seam.…”

“…Forming is not only able to close pores; non-metallic inclusions are also pressed further into the depth of the surface, and thus out of the intended loaded functional area. This is also a desirable effect, as pores or defects directly below the surface are the most critical ones [6].…”

Comparison of coaxial and off-axis nozzle configurations in one step process laser cladding on aluminum substrate

“…Köhler et al (2012) performed fatigue tests of X5CrNi18-10 and 42CrMo4 substrates cladded with Stellite 21 using a coaxial nozzle, finding the correlation of the residual stresses, and the consequently reduction of the fatigue resistance, to the process parameters. An approach of the different cladding materials and process parameters were shown by Yellup (1995), among the performed analysis a correlation between the dilution and hardness was done.…”