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Microstructual and mechanical studies of the dissimilar tabular joints of Incoloy alloy 825 and AISI 316 stainless steel
Journal of Marine Engineering & Technology ( IF 4.1 ) Pub Date : 2018-08-21 , DOI: 10.1080/20464177.2018.1508805
Mehdi Safari 1 , Hossein Mostaan 2 , Ebrahim Derakhshan 3
Affiliation  

ABSTRACT In this work, dissimilar welding of Incoloy alloy 825 and AISI 316 stainless steel tubes is experimentally investigated using gas metal arc welding process. For this purpose, different filler metals such as stainless steel 308, stainless steel 309, stainless steel 316 and Inconel 82 are employed for joining of Incoloy alloy 825 and AISI 316 stainless steel tubes. The results show that during tensile tests, fracture occurred in all weldments in the heat-affected zone (HAZ) of stainless steel 316. Also, it is concluded that dissimilar welds produced by stainless steel 309 filler metal have the maximum tensile strength while the lowest strength is obtained with Inconel 82 filler metal. The results of average hardness prove that the dissimilar joint with filler metal say stainless steel 309 and filler metal say Inconel 82 have maximum and minimum values of average hardness in the weld metal, respectively. The results show a considerable unmixed zone (UMZ) in the form of laminar layers between filler 82 weld metal and the Incoloy 825 base metal along the welding line. In addition, considerable UMZ is seen in the interface of the weld metal/AISI 316 base metal, but more grain growth occurred in the AISI 316 HAZ due to the temperature increase during various welding passes. It is indicated that there is a very narrow UMZ between the 309 weld metal and Incoloy 825 base metal; however, no considerable UMZs can be observed in the AISI 316 base metal.

中文翻译:

Incoloy 825 合金和 AISI 316 不锈钢异种板状接头的微观结构和力学研究

摘要 在这项工作中,使用气体保护金属电弧焊工艺对 Incoloy 825 合金和 AISI 316 不锈钢管的异种焊接进行了实验研究。为此,使用不同的填充金属,例如不锈钢 308、不锈钢 309、不锈钢 316 和 Inconel 82,用于连接 Incoloy 合金 825 和 AISI 316 不锈钢管。结果表明,在拉伸试验中,316不锈钢热影响区(HAZ)的所有焊件均发生断裂。此外,还得出结论,不锈钢309填充金属制成的异种焊缝抗拉强度最大,而焊缝的抗拉强度最低。强度是用 Inconel 82 填充金属获得的。平均硬度的结果证明,填充金属如不锈钢 309 和填充金属如 Inconel 82 的异种接头分别具有焊缝金属平均硬度的最大值和最小值。结果表明,沿焊缝在填充 82 焊缝金属和 Incoloy 825 母材之间存在大量呈层状层形式的未混合区 (UMZ)。此外,在焊接金属/AISI 316 母材的界面中可以看到相当多的 UMZ,但由于各种焊接道次的温度升高,在 AISI 316 HAZ 中出现了更多的晶粒生长。表明309焊缝金属与Incoloy 825母材之间存在非常窄的UMZ;然而,在 AISI 316 贱金属中没有观察到大量的 UMZ。结果表明,沿焊缝在填充 82 焊缝金属和 Incoloy 825 母材之间存在大量呈层状层形式的未混合区 (UMZ)。此外,在焊接金属/AISI 316 母材的界面中可以看到相当多的 UMZ,但由于各种焊接道次的温度升高,在 AISI 316 HAZ 中出现了更多的晶粒生长。表明309焊缝金属与Incoloy 825母材之间存在非常窄的UMZ;然而,在 AISI 316 贱金属中没有观察到大量的 UMZ。结果表明,沿焊缝在填充 82 焊缝金属和 Incoloy 825 母材之间存在大量呈层状层形式的未混合区 (UMZ)。此外,在焊接金属/AISI 316 母材的界面中可以看到相当多的 UMZ,但由于各种焊接道次的温度升高,在 AISI 316 HAZ 中出现了更多的晶粒生长。表明309焊缝金属与Incoloy 825母材之间存在非常窄的UMZ;然而,在 AISI 316 贱金属中没有观察到大量的 UMZ。但由于不同焊接道次的温度升高,AISI 316 HAZ 中出现了更多的晶粒生长。表明309焊缝金属与Incoloy 825母材之间存在非常窄的UMZ;然而,在 AISI 316 贱金属中没有观察到大量的 UMZ。但由于不同焊接道次的温度升高,AISI 316 HAZ 中出现了更多的晶粒生长。表明309焊缝金属与Incoloy 825母材之间存在非常窄的UMZ;然而,在 AISI 316 贱金属中没有观察到大量的 UMZ。
更新日期:2018-08-21
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