ANSTO Publications Online >
Journal Publications >
Journal Articles >
Please use this identifier to cite or link to this item:
|Title: ||Effect of laser clad repair on the fatigue behaviour of ultra-high strength AISI 4340 steel|
|Authors: ||Sun, SD|
|Issue Date: ||12-Jun-2014|
|Citation: ||Sun, S. D., Liu, Q., Brandt, M., Luzin, V., Cottam, R., Janardhana, M., & Clark, G. (2014). Effect of laser clad repair on the fatigue behaviour of ultra-high strength AISI 4340 steel. Materials Science and Engineering: A, 606(0), 46-57. doi: http://dx.doi.org/10.1016/j.msea.2014.03.077|
|Abstract: ||The fatigue behaviour of an ultra-high strength steel (>1800 MPa) was evaluated to assess the potential of using laser cladding as a repair tool for such steels in aeronautical structural applications. AISI 4340 and AerMet 100 steel powder were used to clad over a grind-out region in an AISI 4340 steel substrate using a 2.5 kW ND:YAG laser. Post-clad heat treatment (PCHT) was also investigated. Results showed very poor tensile properties and significantly reduced fatigue life of the AISI 4340 as-clad with a very high hardness and brittle fracture in the clad and HAZ zone. Residual stress results showed a compressive residual stress in the clad region and tensile residual stress in the HAZ. Changing the alloy of the clad layer to AerMet 100 steel, as well as applying a PCHT process, showed promising results as the fatigue life was improved from that of the grind-out substrate. © 2014, Elsevier B.V.|
|Appears in Collections:||Journal Articles|
Files in This Item:
There are no files associated with this item.
Items in APO are protected by copyright, with all rights reserved, unless otherwise indicated.