undercooled austenite

例句：

1. 1. The undercooled austenite is prone to phase transformations.
   亚稳奥氏体容易发生相变。
2. 2.The undercooled austenite has been found to be beneficial for the material's strength.
   研究发现，亚稳奥氏体对材料强度有益。
3. 3. The undercooled austenite was discovered in the early days of metallurgy.
   在冶金学的早期，就发现了亚稳奥氏体。