Integrated Welding Simulation and Experimental Characterization of Weld-Metal and Heat-Affected-Zone Strength in AA6063-T6 Tongji University

Format:

Book

Conference/Event

Author/Creator:

Shao, Jiyong, author.

Meng, Dejian, author.

Xiang, Yao, author.

Gao, Yunkai, author.

Conference Name:

WCX SAE World Congress Experience (2026-04-14 : Detroit, Michigan, United States)

Language:

English

Subjects (All):

Optimization.

Finite element analysis.

Materials properties.

Body structures.

Welding.

Local Subjects:

Optimization.

Finite element analysis.

Materials properties.

Body structures.

Welding.

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2026

Summary:

In the context of automotive lightweighting and efficient manufacturing, welding is a key joining method for aluminum body structures due to its maturity, versatility, and cost effectiveness. This study investigates MIG butt welding of AA6063-T6 sheets using a sequential thermo-mechanical finite element model with a double-ellipsoid heat source. Thermocouple histories and macroscopic metallography of the weld-pool morphology are used to validate the predicted temperature field, and post-weld deformation measured by a coordinate measuring machine is compared with the simulation to confirm overall model reliability. Hardness mapping across the joint partitions the material into weld metal (WM), heat-affected zone (HAZ), and base metal (BM). Miniature tensile specimens extracted along the weld provide local mechanical properties, from which linear strengthhardness relations are established. Building on these results, a five-material equivalent strength model covering WM, HAZ-I, HAZ-II, HAZ-III, and BM is formulated to enable region-wise elastoplastic parameter assignment. The model reproduces the loaddisplacement response of transverse joint tests and accurately identifies necking in HAZ-II. An integrated workflow that combines simulation, measurement, property characterization, and modeling provides robust support for weld-strength assessment and process optimization in aluminum body structures

Notes:

Vendor supplied data

Access Restriction:

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