Searching about the microstructure of Cu-Ni-Zn alloys I came across this article (published 2017) which in its conclusion section says:
"It was observed that the starting and finishing transformation temperatures from austenite to martensite ($A_s$, $A_f$) affected by Zn percent."
As far as know, the starting and finishing temperatures from austenite to martensite must be $M_s$ and $M_f$, so I'm confused now. Any ideas if it's a mistake in the article or everything is okay and I'm getting this wrong?
- $A_s$ - Austenite start temperature
- $A_f$ - Austenite finish temperature
- $M_s$ - martensite start temperature
- $M_f$ - martensite finish temperature