Abstract: Counter-gravity casting (CGC) is a widely adopted material processing technique in metals due to its notable benefits, including enhanced filling behavior, reduced defect occurrence, and elevated mechanical properties. It plays a pivotal role in fabricating intricate, high-quality components. After its inception in the early 1900s, various CGC processes have emerged, such as low-pressure, counter-pressure, vacuum suction, and adjusted pressure casting, which are explored in this discourse with an eye toward further advancements. Despite CGC's superiority over traditional gravity casting and other manufacturing methodologies, specific issues and constraints persist within CGC. This paper endeavors to provide a comprehensive overview of the historical progression of CGC, its recent developments, and the associated research aspects, encompassing topics like filling processes, solidification, microstructural transformations, and the resultant mechanical properties of the fabricated products. Additionally, this paper offers insights into the future challenges and opportunities of CGC.

Key words: CGC (counter-gravity casting), Solidification, Filling, Pressure, Casting