Karolczuk Aleksander, Kluger Krzysztof, Derda Szymon, Prażmowski Mariusz, Paul Henryk
Department of Mechanics and Machine Design, Opole University of Technology, Mikołajczyka 5, 45-271 Opole, Poland.
Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, 30-0 59 Kraków, Poland.
Materials (Basel). 2020 Jun 12;13(12):2686. doi: 10.3390/ma13122686.
This study aimed to analyze the effect of the impact velocity of a Zr 700 flyer plate explosively welded to a Ti Gr. 1/P265GH bimetallic composite on the residual stress formation, structural properties, and tensile strength. The residual stresses were determined by the orbital hole-drilling strain-gauge method in a surface layer of Zr 700 in as-received and as-welded conditions. The analysis of the tensile test results based on a force parallel to interfaces was used to propose a model for predicting the yield force of composite plates. Compressive residual stresses found in the initial state of the Zr 700 plate were transformed to tensile stresses on the surface layer of the welded Zr 700 plate. A higher impact velocity resulted in higher tensile stresses in the Zr 700 surface layer. To increase the resistance of the composite plate to stress-based corrosion cracking, a lower value of impact velocity is recommended in the welding process.
本研究旨在分析爆炸焊接到Ti Gr. 1/P265GH双金属复合材料上的Zr 700飞板的冲击速度对残余应力形成、结构性能和拉伸强度的影响。采用轨道钻孔应变片法测定了Zr 700在原始状态和焊接状态下表面层的残余应力。基于平行于界面的力对拉伸试验结果进行分析，以提出预测复合板屈服力的模型。在Zr 700板初始状态中发现的压缩残余应力在焊接后的Zr 700板表面层转变为拉伸应力。较高的冲击速度导致Zr 700表面层产生更高的拉伸应力。为提高复合板对应力腐蚀开裂的抗性，建议在焊接过程中采用较低的冲击速度值。
