Development in creep age forming modeling and characterization

This paper reviews recent research and development of the Creep Age Forming (CAF) process, as well as different CAF models that have been developed. It discusses process applications in the aviation industry and scientific research, also including various treatment processes for optimizing various characteristics during CAF, creep aging of various Al alloys, various modeling creep curves, process modeling, and spring back prediction. The paper was organized as follows. Firstly, the uniform creep deformation improved by two to five times, and the strength increased by 60–140MPa without compromising ductility by pre-aging and heavy cold-rolling significantly improve both the creep formability and comprehensive properties in an AlMgSi alloy. Second, this paper discusses the creep stress relaxation approach in the presence of coupled boundary conditions and investigates the effect of primary-secondary stress-dependent creep characteristics on predictions for martensitic P92 steel at 650°C. Third, stress aging (i.e. creep aging) is the most beneficial for evolved microstructures to produce a better range of mechanical capacity and corrosion resistance of 7xxx series AlZnMgCu alloys. Lastly, this paper also discussed about creep behavior of Sn5Sb alloy.