AE response of α-brass during stress corrosion crack propagation
AE response of α-brass during stress corrosion crack propagation
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DOI：
10.1016/j.corsci.2007.03.043
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发表时间：
2007-10
影响因子：
8.3
通讯作者：
P. Lapitz;J. Ruzzante;M. G. Alvarez
中科院分区：
文献类型：
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作者：
P. Lapitz;J. Ruzzante;M. G. Alvarez
目前的工作旨在表征 α-黄铜在 SCC 传播过程中的声发射 (AE) 响应。为此，在 1M NaNO2 溶液和 Mattsson 溶液中进行了恒电位控制下的慢应变速率拉伸试验 (SSRT)。分析了穿晶和晶间应力腐蚀开裂 (SCC) 产生的 AE 信号之间的差异。结果表明，TGSCC 繁殖期间的 AE 活性比 IGSCC 繁殖期间的 AE 活性高多个数量级。然而，在 TGSCC 传播期间记录的 AE 信号的平均幅度和上升时间与 IGSCC 传播期间记录的信号的 AE 参数相似。测量的AE活动与传播裂纹留下的金属韧带的机械撕裂有关。
The present work was aimed at characterizing the acoustic emission (AE) response of α-brass during SCC propagation. For that purpose, slow strain rate tensile tests (SSRT) under potentiostatic control were performed in a 1M NaNO2solution and in Mattsson’s solution. The differences between the AE signals generated by transgranular and intergranular stress corrosion cracking (SCC) were analysed. Results show that the AE activity during the propagation of TGSCC is various orders of magnitude higher than the AE activity during the IGSCC propagation. However, the mean amplitude and rise time of the AE signals registered during the propagation of TGSCC are similar to the AE parameters of the signals registered during the propagation of IGSCC. The measured AE activity was associated with the mechanical tearing of the metallic ligaments left behind by the propagating crack.