Searching about microstructure of Cu-Ni-Zn alloys I came across an article (published 2017) which in Conclusion says:
Blockquote It was observed that the starting and finishing transformation temperatures from austenite to martensite (A_s, A_f) affected by Zn percent. Blockquote
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 Ok and I'm getting this wrong?