Study of fusion boundary microstructure and local mismatch of SA508/alloy 52 dissimilar metal weld with buttering

被引：10

作者：

Hytonena, N. ^{[1
]}

Ge, Y. ^{[1
]}

Que, Z. ^{[1
]}

Lindqvist, S. ^{[1
]}

Nevasmaa, P. ^{[1
]}

Virkkunen, I. ^{[2
]}

Efsing, P. ^{[3
,4
]}

机构：

[1] VTT Tech Res Ctr Finland, Nucl Reactor Mat, Kivimiehentie 3, FI-02044 Espoo, Finland

[2] Aalto Univ, Sch Engn, Dept Mech Engn, Espoo 02150, Finland

[3] Ringhals AB, S-43585 Varobacka, Sweden

[4] Royal Inst Technol KTH, Dept Solid Mech, SE-10044 Stockholm, Sweden

来源：

JOURNAL OF NUCLEAR MATERIALS | 2023年 / 583卷

关键词：

Dissimilar metal weld; Alloy; 52; Fusion boundary; Characterization; Buttering; ALLOY-STEEL; MARTENSITE; INTERFACES; BEHAVIOR; JOINT;

D O I：

10.1016/j.jnucmat.2023.154558

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A SA508/Alloy 52 dissimilar metal weld (DMW) mock-up with double-sided Alloy 52 butterings, which is fully representative of Ringhals pressurizer surge nozzle DMW repair solution, was studied. The microstructure, crystal structure, elemental diffusion, carbide formation and macro-, micro-and nano-hardness of the SA508/ nickel-base Alloy 52 buttering fusion boundary (FB) were investigated. Three types of FBs were analyzed, i.e., narrow FB (-80-85% of whole FB), tempered martensitic transition region (-15%) and wide partially mixed zone (-1-2%). The different FB types were induced by the local heat flow and respective elementary diffusion, which significantly influence the local hardness mismatch across the DMW interface and the local brittle fracture behavior.

引用

页数：14

共 40 条

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