"subject to research" is correct and usable in written English.
You can use it to indicate that something is something that requires research or further investigation. For example: "The origin of the ancient ruins is still subject to research."
"It has been a fascinating subject to research," said Freestone.
In fact, underwear is not an easy subject to research.
Due to still manifold drawbacks of applied methods, e.g. Hazop studies, computer-based approaches are subject to research.
As ZVI aging processes are not yet completely understood and are still subject to research, we propose a phenomenological modelling technique instead of a common process-based approach.
The study of CTE is a world about which science knows little, mainly because this isn't an easy subject to research.
This is a tricky subject to research amid a contentious, evolving legislative debate, and it's likely that we missed something or that our analysis can be improved.
If every one of them were willing to be subjected to research, medicine would come up with a cure sooner.
Assign different environments to students (individually or in small groups) as subjects to research in the library.
Since the continuous increment in the number of hysterectomies performed laparoscopically, the aetiology of VCD and explanations for its association with TLH have been subjected to research.
This reinforces the importance of considering how we might justify exposing subjects to research risks, both minimal and greater than minimal, for the benefit of others.
It can be questioned to what extent populations placed under such stress should be subjected to research – it has for example been argued that refugees for example should never be subjected to medical research [ 42].
