Acoustic emissions during tensile test of DC06 and HCT600X

Acoustic emissions during tensile test of DC06 and HCT600X
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DC06和HCT600X拉伸试验时的声发射

DOI:
10.1002/mawe.201800092
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发表时间:
2019
影响因子:
1.1
通讯作者:
Wölki
Wölki
中科院分区:
材料科学4区
文献类型:
--
作者:
Behrens;Hübner;Wölki

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本文研究了DC 06和HCT 600 X材料拉伸过程中的声发射行为。有意识地选择了两种具有不同特性的钢(轻度深冲钢DC 06和高强度钢HCT 600 X),以显示材料特性对产生的声发射的影响。声发射行为和相应的信号彼此明显不同。此外,还研究了应变速率和轧制方向(0°,90°)对声发射行为的影响。这两个参数对拉伸变形过程中产生的声发射有显着的影响。此外,开发了基于声发射参数FCOG(质心频率)的双相钢损伤开始检测的新标准。该准则支持以下假设:在双相钢的拉伸变形期间,存在两种失效机制,铁素体/马氏体界面脱粘和马氏体相断裂。
In this paper the acoustic emission behaviour during tensile tests of the materials DC06 and HCT600X is studied. Two steels with different characteristics (mild deep‐drawing steel DC06 and high‐strength steel HCT600X) are consciously chosen to show the influence of the material properties on the generated acoustic emissions. The acoustic emission behaviour and the corresponding signals differ clearly from each other. In addition, the effect of the strain rate as well as the rolling direction (0°, 90°) on the acoustic emission behaviour is investigated. Both parameters have a significant influence on the resulting acoustic emissions during tensile deformation. Furthermore, a new criterion based on the acoustic emission parameter FCOG (centroid frequency) for detection of damage beginning in dual‐phase steels is developed. The criterion supports the assumption that during tensile deformation of dual‐phase steels two failure mechanisms, ferrite/martensite interface decohesion and martensite phase fracture, exist.
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