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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Acoustic emissions during fracture toughness tests of steels exhibiting varying ductility
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Acoustic emissions during fracture toughness tests of steels exhibiting varying ductility

机译：表现出不同延展性的钢的断裂韧性测试期间的声发射

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摘要

This investigation is primarily aimed at examining steels with varying ductility using characteristics of acoustic emission (AE). Four steels (AISI 1060, AISI 1080, SA333 grade 6 and AISI 304LN) were selected and their structure property relations were characterized using standard metallographic examinations, hardness and tensile properties. Fracture toughness of these steels was determined as per the guidelines of ASTM standard E1820 with simultaneous recording of AE signals. The results of these investigations have been used to demonstrate that: (a) nature of the variation of AE cumulative counts with time is different for linear and non-linear load-displacement plots, (b) synergistic analysis of the rate of change of cumulative energy, cumulative counts and intensity of AE signals provide the point of crack initiation in a material, and (c) fracture toughness of a material estimated using AE parameters is lower compared to that obtained by ASTM standard procedure.
机译：这项研究的主要目的是利用声发射（AE）特性检查延展性不同的钢。选择了四种钢（AISI 1060，AISI 1080，SA333 6级和AISI 304LN），并通过标准金相检验，硬度和拉伸性能表征了它们的结构性能关系。根据ASTM标准E1820的指南确定这些钢的断裂韧性，同时记录AE信号。这些调查的结果已被证明：（a）线性和非线性载荷-位移图的AE累积计数随时间变化的性质不同；（b）累积变化率的协同分析能量，AE信号的累积计数和强度提供了材料中的裂纹萌生点，并且（c）使用AE参数估算的材料的断裂韧性比通过ASTM标准程序获得的更低。

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