Process Optimization of Dual-Laser Beam Welding of Advanced Al-Li Alloys Through Hot Cracking Susceptibility Modeling

被引：36

作者：

Tian, Yingtao ^{[1
]}

Robson, Joseph D. ^{[1
]}

Riekehr, Stefan ^{[2
]}

Kashaev, Nikolai ^{[2
]}

Wang, Li ^{[1
]}

Lowe, Tristan ^{[3
]}

Karanika, Alexandra ^{[4
]}

机构：

[1] Univ Manchester, Sch Mat, Manchester M13 9PL, Lancs, England

[2] Helmholtz Zentrum Geesthacht, Inst Mat Res, Mat Mech, Max Planck Str 1, D-21502 Geesthacht, Germany

[3] Univ Manchester, Sch Mat, Henry Mosely Xray Imaging Facil, Manchester, Lancs, England

[4] Hellen Aerosp Ind SA, Res & Prod Design, POB 23, Schimatari 32009, Greece

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2016年 / 47A卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

FINITE-ELEMENT MODEL; WELDABILITY;

D O I：

10.1007/s11661-016-3509-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Laser welding of advanced Al-Li alloys has been developed to meet the increasing demand for light-weight and high-strength aerospace structures. However, welding of high-strength Al-Li alloys can be problematic due to the tendency for hot cracking. Finding suitable welding parameters and filler material for this combination currently requires extensive and costly trial and error experimentation. The present work describes a novel coupled model to predict hot crack susceptibility (HCS) in Al-Li welds. Such a model can be used to shortcut the weld development process. The coupled model combines finite element process simulation with a two-level HCS model. The finite element process model predicts thermal field data for the subsequent HCS hot cracking prediction. The model can be used to predict the influences of filler wire composition and welding parameters on HCS. The modeling results have been validated by comparing predictions with results from fully instrumented laser welds performed under a range of process parameters and analyzed using high-resolution X-ray tomography to identify weld defects. It is shown that the model is capable of accurately predicting the thermal field around the weld and the trend of HCS as a function of process parameters.

引用

页码：3533 / 3544

页数：12

共 20 条

[1] Clyne T., 1981, The influence of composition on solidification cracking susceptibility in binary alloy systems
[2] Mechanisms for Solidification Crack Initiation and Growth in Aluminum Welding
Coniglio, N.
Cross, C. E.
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2009, 40A (11): : 2718 - 2728
[3] Drezet JM, 2008, HOT CRACKING PHENOMENA IN WELDS II, P19
[4] Drezet J.-M., 2008, 61 INT C INT I WELD
[5] Observation and Prediction of the Hot Tear Susceptibility of Ternary Al-Si-Mg Alloys
Easton, Mark A.
Wang, Hao
Grandfield, John
Davidson, Cameron J.
Stjohn, David H.
Sweet, Lisa D.
Couper, Malcolm J.
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2012, 43A (09): : 3227 - 3238
[6] A quest for a new hot tearing criterion
Eskin, D. G.
Katgerman, L.
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2007, 38A (07): : 1511 - 1519
[7] A NEW FINITE-ELEMENT MODEL FOR WELDING HEAT-SOURCES
GOLDAK, J
CHAKRAVARTI, A
BIBBY, M
[J]. METALLURGICAL TRANSACTIONS B-PROCESS METALLURGY, 1984, 15 (02): : 299 - 305
[8] Guo Z., 2007, P 7 PAC RIM INT C MO, P19
[9] Modeling of hot tearing formation during solidification
Hatami, N.
Babaei, R.
Dadashzadeh, M.
Davami, P.
[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2008, 205 (1-3) : 506 - 513
[10] Weldability of Li-bearing aluminium alloys
Kostrivas, A
Lippold, JC
[J]. INTERNATIONAL MATERIALS REVIEWS, 1999, 44 (06) : 217 - 237

← 1 2 →