Effect of composition on ductility dip cracking of 690 nickel alloy during multipass welding

被引：14

作者：

Rapetti, A. ^{[1
,2
]}

Christien, F. ^{[3
]}

Tancret, F. ^{[2
]}

Todeschini, P. ^{[1
]}

Hendili, S. ^{[4
]}

机构：

[1] EDF R&D, Mat & Mech Components Dept, F-77818 Moret Sur Loing, France

[2] Univ Nantes, Polytech Nantes, Inst Mat Jean Rouxel IMN, BP 50609, F-44306 Nantes 3, France

[3] Univ Lyon, Mines St Etienne, Ctr SMS, CNRS,UMR 5307 LGF, F-42023 St Etienne, France

[4] EDF R&D, Ind Risk Management Dept, F-78400 Chatou, France

来源：

MATERIALS TODAY COMMUNICATIONS | 2020年 / 24卷

关键词：

Ductility dip cracking; DDC; Intermediate temperature embrittlement; Nickel alloys; Grain boundary segregation; Multipass welding; Model alloys; HIGH-TEMPERATURE BEHAVIOR; PART I; SULFUR SEGREGATION; HOT DUCTILITY; NI; SUSCEPTIBILITY; METAL; MICROSTRUCTURE; MECHANISM; MICROCRACKING;

D O I：

10.1016/j.mtcomm.2020.101163

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper deals with Ductility Dip Cracking (DDC) during multipass welding of 690 filler metals. In addition to industrial alloys (152 and 52 M), model alloys of controlled purity were also used to unambiguously demonstrate the effect of elemental sulphur and carbon. The sensitivity of each alloy to DDC was measured with the recently developed Refusion Cracking Test (RCT). It is confirmed that the cracks observed in this study result from DDC, not from liquation nor solidification cracking. DDC cracks are in most cases observed after several welding passes. The detrimental effect of sulphur and beneficial effect of carbon on the resistance to DDC are clearly evidenced. The good resistance to DDC of the industrial alloys, compared to the model alloys, is related to their niobium content.

引用

页数：11

共 68 条

[1] EFFECT OF INTERFACIAL SULFUR SEGREGATION ON THE HOT DUCTILITY DROP OF FE-NI36 ALLOYS [J].