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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Filler Metals on the Weldability and Mechanical Properties of Multi-pass PCGTA Weldments of AISI 316L
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Effect of Filler Metals on the Weldability and Mechanical Properties of Multi-pass PCGTA Weldments of AISI 316L

机译：填充金属对AISI 316L多道次PCGTA焊缝可焊性和力学性能的影响

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摘要

The influence of filler metals on the microstructure, mechanical properties, and corrosion behavior of AISI 316L welds was investigated. Pulsed current gas tungsten arc welding was employed to join the AISI 316L plates using two different fillers ER2553 and ERNiCr-3. Microstructures studies showed the presence of different forms of austenite on employing ER2553 filler and formation of migrated grain boundaries at the weld zone while using ERNiCr-3 filler. Tensile studies corroborated that the tensile strength was greater for the weldments employing ER2553 filler. Charpy V-notch studies ascertained that the impact toughness was greater for ER2553 weldments as compared to the parent metal. Potentiodynamic polarization curves clearly inferred that the weld zone of ER2553 exhibited better corrosion resistance among the various coupons tested. It was concluded from the study that ER2553 exhibited better mechanical and corrosion properties and could be adopted to achieve optimal properties compared to over-alloyed filler.
机译：研究了填充金属对AISI 316L焊缝的组织，力学性能和腐蚀行为的影响。使用脉冲电流气钨极电弧焊，使用两种不同的填充剂ER2553和ERNiCr-3将AISI 316L板连接起来。显微组织研究表明，使用ER2553填料时会出现不同形式的奥氏体，而使用ERNiCr-3填料时会在焊接区形成迁移的晶界。拉伸研究证实，采用ER2553填料的焊件的抗拉强度更高。夏比V型缺口研究确定，与母材相比，ER2553焊件的冲击韧性更高。电位动力学极化曲线清楚地推断出，ER2553的焊接区域在测试的各种试样中均表现出更好的耐腐蚀性。从研究中得出的结论是，与过度合金化的填料相比，ER2553具有更好的机械性能和耐腐蚀性能，可以用来实现最佳性能。

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