In situ metallic porous structure formation due to ultra high heating and cooling rates during an electromagnetic pulse welding

被引：48

作者：

Sapanathan, T. ^{[1
]}

Raoelison, R. N. ^{[1
,2
]}

Buiron, N. ^{[1
]}

Rachik, M. ^{[1
]}

机构：

[1] Univ Technol Compiegne, Sorbonne Univ, CNRS UMR 7337, Ctr Rech Royallieu,Lab Roberval,CS 60319, F-60203 Compiegne, France

[2] Univ Technol Belfort Montbeliard, Univ Bourgogne Franche Comte, IRTES EA7274, F-90100 Belfort, France

来源：

SCRIPTA MATERIALIA | 2017年 / 128卷

关键词：

High speed impact; Pores; Interface; Thermomechanical effect; Ultra high heating; VOID GROWTH-MODELS; SIMULATION; JOINT; MICROSTRUCTURE; MORPHOLOGY; INTERFACE; VELOCITY;

D O I：

10.1016/j.scriptamat.2016.09.030

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Porous structure formation resulted at the interface of electromagnetic pulse welded joints are investigated and revealed, to identify the, development of sub-micron to few micron sized pores due to ultra high rate of heating and cooling. Collision velocity along the overlapping length was predicted using a multi-physics numerical simulation and subsequently this velocity field was used to estimate the heating and cooling rates as about 10(9) degrees C s(-1). Predicted temperature, pressure and strain variations clearly evidence the observations of porous structure formation that is potentially facilitated by sequential phenomena of pores nucleation, coalescence and growth within the molten intermediate phase. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：10 / 13

页数：4

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