|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Fatigue and Fracture
||Accounting for Thermal Process Induced Residual Stress in Additive Manufacturing Based Laser Cladding Repair of High-strength AerMetŪ100 Steel
||Kevin Walker, Stephen Sun, Milan Brandt, Adrian DeWald, Michael Hill
|On-Site Speaker (Planned)
Additive manufacturing based laser cladding has emerged as an effective and efficient technology to restore strength and fatigue life to damaged high-strength metallic alloy aircraft components and structures. Recent research into laser cladding repair of ultra-high strength AerMetŪ100 steel showed that the fatigue crack growth properties in the repaired case were improved compared to the as-damaged case. Assessment of this case required knowledge of the through the depth residual stress profile which was measured by neutron diffraction. The current work included characterising the residual stress profile in that near-surface region by X-Ray diffraction combined with sequential electro-polishing. The results matched up well with the neutron data, and are considered reliable. Further assessment was also conducted using compliance based slitting methods and those results are also presented. The updated residual stress data were then combined with an advanced and updated fatigue crack growth model which was correlated to Quantitative Fractography results.
||Planned: Supplemental Proceedings volume