untwinned martensite

例句：

1. 1.The steel was heat treated to produce an unwound martensite structure.
   这种钢材经过热处理，形成了未孪晶马氏体结构。
2. 2. The engineer explained the process of producing unwound martensite in the manufacturing process.
   工程师解释了在制造过程中产生未孪晶马氏体的过程。
3. 3.The unwound martensite exhibits unique mechanical properties that make it suitable for certain applications.
   未孪晶马氏体展现出独特的机械性能，使其在某些应用中具有优势。