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两种不同填充材料的P92钢与合金617气体钨极电弧焊接头的高温拉伸行为

High-Temperature Tensile Behaviour of GTAW Joints of P92 Steel and Alloy 617 for Two Different Fillers.

作者信息

Kumar Amit, Sirohi Sachin, Pandey Shailesh Mani, Kumar Pradeep, Fydrych Dariusz, Pandey Chandan

机构信息

Mechanical Department, Indian Institute of Technology Jodhpur, N.H. 62 Nagaur Road, Karwar 342037, India.

Mechanical Department, SRM Institute of Science and Technology, Delhi NCR Campus, Modinagar 201204, India.

出版信息

Materials (Basel). 2023 Aug 28;16(17):5880. doi: 10.3390/ma16175880.

DOI:10.3390/ma16175880
PMID:37687573
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10488703/
Abstract

This study explores the high-temperature (HT) tensile rupture characteristics of a dissimilar gas-tungsten-arc-welded (GTAW) joint between P92 steel and Alloy 617, fabricated using ER62S-B9 and ERNiCrCoMo-1 fillers. The high-temperature tensile tests were performed at elevated temperatures of 550 °C and 650 °C. An optical microscope (OM) and a field emission scanning electron microscope (FESEM) were utilized to characterize the joint. The high-temperature test results indicated that the specimen failed at the P92 base metal/intercritical heat-affected zone (ICHAZ) rather than the weld metal for the ERNiCrCoMo-1(IN617) filler. This finding confirmed the suitability of the joint for use in the Indian advanced ultra-supercritical (A-USC) program. The fracture surface morphology and presence of precipitates were analysed using an SEM equipped with energy dispersive spectroscopy (EDS). The appearance of the dimples and voids confirmed that both welded fillers underwent ductile-dominant fracture. EDS analysis revealed the presence of Cr-rich MC phases, which was confirmed on the fracture surface of the ER62S-B9 weld (P92-weld). The hardness plot was analysed both in the as-welded condition and after the fracture.

摘要

本研究探讨了采用ER62S-B9和ERNiCrCoMo-1焊材制造的P92钢与合金617之间的异种气体钨极电弧焊（GTAW）接头的高温（HT）拉伸断裂特性。高温拉伸试验在550℃和650℃的高温下进行。利用光学显微镜（OM）和场发射扫描电子显微镜（FESEM）对接头进行表征。高温试验结果表明，对于ERNiCrCoMo-1（IN617）焊材，试样在P92母材/临界热影响区（ICHAZ）而非焊缝金属处失效。这一发现证实了该接头适用于印度先进超超临界（A-USC）项目。使用配备能谱仪（EDS）的扫描电子显微镜对断口表面形貌和析出相的存在情况进行了分析。韧窝和孔洞的出现证实了两种焊接填充金属均发生了韧性主导型断裂。EDS分析揭示了富Cr的MC相的存在，这在ER62S-B9焊缝（P92焊缝）的断口表面得到了证实。对焊态和断裂后的硬度曲线进行了分析。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a450/10488703/7939e5f0b35b/materials-16-05880-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a450/10488703/117e8f36af2b/materials-16-05880-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a450/10488703/9253b63c27ab/materials-16-05880-g013.jpg

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本文引用的文献

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2
Microstructures and Tensile Properties of 9Cr-F/M Steel at Elevated Temperatures.9Cr-F/M钢在高温下的微观结构与拉伸性能
Materials (Basel). 2022 Feb 8;15(3):1248. doi: 10.3390/ma15031248.