Mohammed Arshed Abdulhamed, Haris Sallehuddin Mohamed
Department of Mechanical Engineering College of Engineering, University of Diyala, Baquba, Diyala, Iraq.
Department of Mechanical & Manufacturing Engineering, Faculty of Engineering & the Built Environment- University Kebangsaan Malaysia, UKM, 43600, Bangi, Selangor, Malaysia.
Sci Rep. 2025 Jul 26;15(1):27195. doi: 10.1038/s41598-025-99633-1.
This study is the most important part of the technique of using the pressure transmission coefficient (PTC) of the ultrasonic waves in extracting the most important mechanical properties (yield stress and ultimate strength) of alloys in general. In this study, 48 alloys were tested. For scientific reasons mentioned in this study, such as Magnetomechanical acoustic emission, the alloy's behavior with the PTC values of the ultrasonic waves, and others, these alloys were classified into several levels. The alloys at the first level were classified into ferromagnetic and non-ferromagnetic alloys (12 alloys of non-ferromagnetic). In the second level, ferromagnetic alloys were classified into nickel alloys (8 alloys) and steel alloys. At the third level, these steel alloys were classified into stainless steel alloys and a group of plain carbon steel and low-alloy steels (10 alloys). Finally, stainless steel was classified into austenitic steel alloys (10 alloys), and a group of alloys (martensitic, duplex, and ferritic alloys) (8 alloys). The accuracy of these results ranged between 80 ~ 99% compared to ASTM values. This percentage excludes alloys that suffer a phase transformation during tensile testing, such as alloy TiC and others. The results proved that the behavior of the values of PTC changes with a change in the percentage of carbon in carbon steel alloys. On the other hand, there is a difference in PTC values behavior with the austenitic stainless-steel alloys than with a group of stainless-steel alloys (martensitic, duplex, and ferritic alloys), in addition to many conclusions included in this study.
本研究是利用超声波压力传递系数（PTC）提取合金一般最重要力学性能（屈服应力和极限强度）技术中最重要的部分。在本研究中，对48种合金进行了测试。出于本研究中提到的科学原因，如磁机械声发射、合金在超声波PTC值下的行为等，这些合金被分为几个级别。一级合金分为铁磁合金和非铁磁合金（12种非铁磁合金）。在二级中，铁磁合金分为镍合金（8种合金）和钢合金。在三级中，这些钢合金分为不锈钢合金以及一组普通碳钢和低合金钢（10种合金）。最后，不锈钢分为奥氏体不锈钢合金（10种合金）以及一组合金（马氏体、双相和铁素体合金）（8种合金）。与ASTM值相比，这些结果的准确度在80%至99%之间。该百分比不包括在拉伸试验期间发生相变的合金，如合金TiC等。结果证明，碳钢合金中PTC值的行为随碳百分比的变化而变化。另一方面，奥氏体不锈钢合金的PTC值行为与一组不锈钢合金（马氏体、双相和铁素体合金）的PTC值行为存在差异，此外本研究还包含许多结论。
