acicular tempered martensite

例句：

1. 1. Thesteel was heat treated to produce this unique acicular tempered martensite structure.
   这种钢经过热处理，形成了独特的晶粒状退火马氏体结构。
2. 2.The engineer used this material for its exceptional strength and toughness in the acicular tempered martensite phase.
   工程师使用这种材料，因其在晶粒状退火马氏相中具有卓越的强度和韧性。
3. 3. The acicular tempered martensite phase is crucial for the material's performance in high-temperature applications.
   晶粒状退火马氏相对于材料在高温应用中的性能至关重要。