Superalloy is a multi-metal alloy system that exhibits a good combination of high-temperature properties such as resistance to thermal creep deformation, oxidation, and corrosion, and has a service temperature often above 0.7 times the absolute melting temperature. Alloy Allvac 718Plus is a relatively new Ni-based superalloy developed to improve upon the properties Inconel 718. It shows improvement in service temperature up to 704oC (55oC more than IN718) because of its chemical composition, microstructure and major strengthening phase, γ’. Because the elevated-temperature microstructural stability influences both the mechanical properties and service life of Ni-based superalloys, it is important to understand the microstructural evolution during elevated-temperature exposures. These microstructural changes play a vital role in deciding the mechanism of particle-dislocations interaction during deformation as the mechanism changes with changing particle size. The understanding of active mechanism with uni-modal distribution with average γ’ particle size is well studied in the literature, but consideration of smaller and larger precipitates together, called bi-modal, is still lacking. The study is aimed to understand the role of bi-modal precipitates in the kinetics of precipitation and its stability under various thermal and tensile elastic stress conditions. In the present work, solutionizing temperature will be first optimized for further aging treatment. We will develop a bi-modal distribution with varying aging heat-treatment parameter such as holding time, temperature, and cooling rate. This bi-modal microstructure will be further exposed and deformed to study the changes in microstructure as well as particle-dislocation interaction mechanism. A comparative study of structure-property correlation will also be conducted between uni-modal and standard aged samples. Different characterization techniques will be used for achieving these goals.