Aluminum cast parts often exhibit porosity. Hot isostatic pressing (HIP) is a method to reduce porosity and thus to improve mechanical properties. This is achieved by heating the castings to temperatures below the solidus temperature while applying a high isostatic gas pressure. Besides HIP, the heat treatment of precipitation hardening aluminum alloys is widely used to improve mechanical properties by cooling down the parts rapidly after annealing at ambient pressure.
Involving different mechanisms both processes result in an improvement of the mechanical properties. Hence it is worth finding out, whether a combination of the two processes by integrating the heat treatment into HIP leads to synergetic effects. With the objective of defining optimal parameters for a combined process, the influence of the different process parameters on the microstructure and on the mechanical properties was investigated.
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Aluminum cast parts often exhibit porosity. Hot isostatic pressing (HIP) is a method to reduce porosity and thus to improve mechanical properties. This is achieved by heating the castings to temperatures below the solidus temperature while applying a high isostatic gas pressure. Besides HIP, the heat treatment of precipitation hardening aluminum alloys is widely used to improve mechanical properties by cooling down the parts rapidly after annealing at ambient pressure.
Involving different mecha...
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