The phrase "age replacement" is correct and usable in written English.
It can be used in contexts related to maintenance, management, or replacement strategies, particularly in fields like engineering or healthcare.
Example: "The company implemented an age replacement strategy to ensure that older equipment was replaced before it failed."
Alternatives: "age-based replacement" or "replacement by age".
Notes was supposed to become a New Age replacement for IBM's old- fashioned mainframe-based mail systems, Profs and OfficeVision.
For each building, a complete characterization process was developed in order to assign to each of the entries in the database relevant data such as construction material, structural system, number of stories, age, replacement cost, and number of occupants, among other variables.
The best example of how age replacement works against the Republicans is the marriage equality issue.
This is a major problem in a country where, due to changing opinions and age replacement, socially conservative views are becoming less popular.
This, in of itself, would not be a problem, but in a country where every day the voting population is less white and, due to age replacement, less likely to have been born before 1960, it becomes a real concern.
Schwartz, a lifelong science fiction fan, was the inspiration for the re-imagined Green Lantern —the Golden Age character, railroad engineer Alan Scott, possessed a ring powered by a magical lantern, but his Silver Age replacement, test pilot Hal Jordan, had a ring powered by an alien battery and created by an intergalactic police force.
Despite all the benefits of online tools, when it comes to finding out what makes a house feel like a home there is not yet a digital-age replacement for open houses.
One benefit of Twitter, for journalists at least, is that it serves as an easily accessible catch bin for real-time public reactions; it's basically the Internet-age replacement for the hoary old "Man on the Street" features newspapers once relied on.
The Nuggets would get a valuable draft pick plus an explosive scorer in Crawford and a capable if aging replacement for Chandler in Barnes.
Differences in the number of dams per family were due to reasons such as unexpected death without suitably aged replacement or exclusion.
In several recent works, age-replacement policy was extensively studied.
