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珠光体组织转变的非线性超声表征

Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2017-02-10

Journal: 无损检测

Volume: 39

Issue: 2

Page Number: 1-4

ISSN: 1000-6656

Key Words: 珠光体球化;非线性参数;表征

Abstract: 珠光体的过度球化会导致材料力学性能的下降,常规线性超声检测技术对材料的组织变化不敏感。采用不同的热处理工艺对T8钢试样进行处理,得到不同球化状态的珠光体组织,并建立了珠光体组织转变的非线性超声测量系统,试验测定了相应的非线性参数β。结果表明,随着珠光体球化程度增加,声速和衰减系数无明显变化,而非线性参数β呈现显著增加的趋势,可对材料的组织演化进行表征。

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