As for the welding of new generation aluminum-lithium alloys, however, this technique is limited because of high hot cracking susceptibility and strengthening elements' uneven distributions within weld.
The paper therefore concludes by highlighting some areas where new investigations could provide important insights into the structural behaviour of strengthened elements.
Fracture of strengthening elements For certain forms of reinforcement an allowance for the fracture of the strengthening elements, i.e., FRP, GFRP may be necessary (Oehlers et al. 1994). .
Although failure of FRCM strengthened elements depends on different parameters, such as the composite and substrate geometrical and mechanical properties, debonding at the matrix-fiber interface is generally the failure mechanism.
To optimize the new alloy, both the combined solid solution strengthening of Cr-Co-Mo-W and the precipitation strengthening elements Nb, Ti and Al are adopted, because Nb is a good γ'-strengthening element in combination with Ti and Al for Ni-base superalloy.
The objectives of the experimental program were to: (a) provide a better understanding of the effectiveness of shear reinforcement offered by the addition of FRCM; (b) analyze the failure modes experienced by FRCM strengthened elements; and, (c) investigate the FRCM load transfer mechanism.
Large amounts of plate-like μ phase weakened the strength of γ matrix by the depletion of solid solution strengthening elements, while the precipitation of discrete M23C6 carbides along grain boundaries were attributed to the strengthening of grain boundaries after thermal exposure at 900 °C in comparison with those at 1000 °C.
Moreover, it is possible that the intervention maintained and strengthened elements of the sick role, instead of enhancing the role as a capable job seeker.
Each wheel has 36 spokes, rather than the standard 32, another strengthening element.
