针状组织、针状结构 acicular structure
针状组织 针状结构
Needle-like tissue needle-like structure
以上为机器翻译结果，长、整句建议使用 人工翻译 。
熔化区和固态相变区硬化相组织极为细小，马氏体呈微细针状，具有孪晶亚结构。
It is found that the structure of the hardened phase in melting and transformation zone is very tiny, the martensite appears to be tiny acicular and possesses twin substructure.
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