退火对AW5754铝合金-AZ31B镁合金爆炸焊接双金属性能的影响,Journal of Materials Engineering and Performance

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退火对AW5754铝合金-AZ31B镁合金爆炸焊接双金属性能的影响
Journal of Materials Engineering and Performance ( IF 2.2 ) Pub Date : 2019-10-03 , DOI: 10.1007/s11665-019-04361-z
Miroslav Sahul , Martin Sahul , Ján Lokaj , Ľubomír Čaplovič , Petr Nesvadba , Barbara Odokienová

将AW5754铝合金与AZ31B镁合金进行爆炸焊接。AW5754被提议作为传单。在爆炸焊接过程中使用了并行设置。爆炸焊接后，将AW5754 / AZ31B复合板在250、300和350°C退火2、3、4和5 h。双金属的特征在于规则的波浪界面。退火导致产生金属间化合物（IMC）。随着退火温度和时间的增加，IMC界面层的厚度增加。在350°C退火5 h后记录最高厚度的IMC层，平均厚度为67 µm。EDS分析表明，接近AW5754合金的界面层是由Al ₃ Mg ₂形成的。IMC和与AZ31B合金相邻的界面层由Mg ₁₇ Al ₁₂ IMC组成。明亮的颗粒散布在AW5754-Al ₃ Mg ₂ IMC接口处。产生的双金属界面的显微硬度的提高与加工硬化有关。退火过程后，由于界面处存在IMC，显微硬度值增加到了218 HV0.025。由于重结晶，热处理后发现靠近IMC界面层的位置的显微硬度降低。双金属的抗拉强度达到120MPa。退火导致双金属拉伸强度降低。

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The Effect of Annealing on the Properties of AW5754 Aluminum Alloy-AZ31B Magnesium Alloy Explosively Welded Bimetals

Explosive welding of AW5754 aluminum alloy to AZ31B magnesium alloy was performed. AW5754 was proposed as a flyer plate. A parallel setup was used during explosive welding. The annealing of AW5754/AZ31B composite plate at 250, 300 and 350 °C for 2, 3, 4 and 5 h was performed after explosive welding. Bimetals were characterized by regular wavy interface. Annealing resulted in the creation of intermetallic compounds (IMCs). The increase in the thickness of IMC interfacial layer was observed with increasing of annealing temperature and time. IMC layer of highest thickness was recorded after annealing at 350 °C for 5 h and averaged 67 µm. EDS analysis showed that the interfacial layer close to AW5754 alloy was formed by Al₃Mg₂ IMC, and interfacial layer adjacent to the AZ31B alloy consisted of Mg₁₇Al₁₂ IMC. Bright particles were spread at the AW5754-Al₃Mg₂ IMC interface. Rise in the microhardness at the interface of produced bimetal was associated with work hardening. Microhardness values increased to 218 HV0.025 after annealing process due to IMCs present at the interface. Decrease in microhardness in locations close to the IMC interfacial layer was found after heat treatment due to recrystallization. The bimetal tensile strength reached 120 MPa. The annealing resulted in decrease in the bimetal tensile strength.

更新日期：2019-10-03

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