Investigation into the effect of beam shape on melt pool characteristics using analytical modelling

被引：19

作者：

Ahmed, N. ^{[1
]}

Voisey, K. T. ^{[1
]}

McCartney, D. G. ^{[1
]}

机构：

[1] Univ Nottingham, Fac Engn, Mat Mech & Struct Res Div, Nottingham NG7 2RD, England

来源：

OPTICS AND LASERS IN ENGINEERING | 2010年 / 48卷 / 05期

关键词：

Analytical modelling; Laser surface melting; Diode laser; Inconel; 625; Melt depth; Melt pool profile; CORROSION BEHAVIOR; LASER; STEEL; PREDICTION; ALLOYS; DEPTH; AREA;

D O I：

10.1016/j.optlaseng.2009.12.013

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An established analytical model is used to simulate an extended laser beam. Multiple Gaussian sources are superimposed to form a rectangular beam and results are compared with a single circular Gaussian source model as well as experimental results from a high power diode laser with a rectangular beam. Melt depth and melt pool profile and progression have been predicted by modeling, which are compared with experimental results from melting of Inconel 625. The model produced is shown to give a reasonable prediction of melt pool shape and can be usefully employed to help optimise overlap required for laser surface processing applications. The value of absorptivity used in the model can be used as a fitting parameter to optimise the match between experimental and predicted results. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：548 / 554

页数：7

共 14 条

[1] THE TRANSFORMATION HARDENING OF STEEL SURFACES BY LASER-BEAMS .1. HYPO-EUTECTOID STEELS [J].

ASHBY, MF ;

EASTERLING, KE .

ACTA METALLURGICA, 1984, 32 (11) :1935-&

[2]

Bass M., 1983, Physical Processes in Laser-Materials Interactions. Proceedings of the 1980 NATO Advanced Study Institute, P77

[3] Pitting corrosion behaviour of large area laser surface treated 304L stainless-steel [J].

Chong, PH ;

Liu, Z ;

Wang, XY ;

Skeldon, P .

THIN SOLID FILMS, 2004, 453 :388-393

[4] HIGH-TEMPERATURE THERMAL-DIFFUSIVITY OF NICKEL-BASED SUPERALLOYS AND INTERMETALLIC COMPOUNDS [J].

HAZOTTE, A ;

PERROT, B ;

ARCHAMBAULT, P .

JOURNAL DE PHYSIQUE IV, 1993, 3 (C7) :351-354

[5] PREDICTION OF LASER TRANSFORMATION HARDENING DEPTH USING A LINE SOURCE MODEL [J].

HU, C ;

BAKER, TN .

ACTA METALLURGICA ET MATERIALIA, 1995, 43 (09) :3563-3569

[6] DIAGRAMS FOR LASER MATERIALS PROCESSING [J].

ION, JC ;

SHERCLIFF, HR ;

ASHBY, MF .

ACTA METALLURGICA ET MATERIALIA, 1992, 40 (07) :1539-1551

[7] Fundamental understanding of the corrosion performance of laser-melted metallic alloys [J].

Liu, Z ;

Chong, PH ;

Skeldon, P ;

Hilton, PA ;

Spencer, JT ;

Quayle, B .

SURFACE & COATINGS TECHNOLOGY, 2006, 200 (18-19) :5514-5525

[8] Marangoni convection and weld shape variations in Ar-O2 and Ar-CO2 shielded GTA welding [J].

Lu, SP ;

Fujii, H ;

Nogi, K .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2004, 380 (1-2) :290-297

[9] Laser transformation hardening of steel: effects of beam mode, beam size, and composition [J].

Reed, RC ;

Shen, Z ;

Robinson, JM ;

Akbay, T .

MATERIALS SCIENCE AND TECHNOLOGY, 1999, 15 (01) :109-118

[10]

Rykalin N., 1978, LASER MACHINING WELD

← 1 2 →