In this section
@article{Ahn:2018:10.1016/j.ijlmm.2018.07.003,
author = {Ahn, J and He, E and Chen, L and Dear, JP and Shao, Z and Davies, C},
doi = {10.1016/j.ijlmm.2018.07.003},
journal = {International Journal of Lightweight Materials and Manufacture},
pages = {179--188},
title = {In-situ micro-tensile testing of AA2024-T3 fibre laser welds with digital image correlation as a function of welding speed},
url = {http://dx.doi.org/10.1016/j.ijlmm.2018.07.003},
volume = {1},
year = {2018}
}
TY - JOUR
AB - In this paper, the influence of welding speed on tensile properties of AA2024-T3 fibre laser welds was investigated by monitoring the deformation behaviour during tensile loading. In-situ micro-tensile testing combined with a high-resolution optical microscope and DIC was used to measure strain distribution in narrow weld regions showing characteristics of fibre laser beam welding with limited metallurgical modifications. A chemical etching technique was used to generate a micro-scale random speckle pattern by revealing the weld microstructure. Such pattern enabled a sufficient spatial resolution of strain while keeping the weld seam visible during deformation. The results of microstructural and mechanical properties determined under numerous welding speeds indicated that increasing the welding speed led to the transition of weld pool shape from circular to elliptical to teardrop with a greater fraction of equiaxed dendrites. The weaker strength of the weld, as measured by local lower micro-hardness values, constrained significant plasticity development locally within the weld. Tensile tests revealed that increasing the welding speed resulted in greater yield strength and ultimate tensile strength, whereas, total elongation to failure dropped. The tensile properties improved with increasing welding speed as the fraction of equiaxed dendrites increased.
AU - Ahn,J
AU - He,E
AU - Chen,L
AU - Dear,JP
AU - Shao,Z
AU - Davies,C
DO - 10.1016/j.ijlmm.2018.07.003
EP - 188
PY - 2018///
SN - 2588-8404
SP - 179
TI - In-situ micro-tensile testing of AA2024-T3 fibre laser welds with digital image correlation as a function of welding speed
T2 - International Journal of Lightweight Materials and Manufacture
UR - http://dx.doi.org/10.1016/j.ijlmm.2018.07.003
UR - https://www.sciencedirect.com/science/article/pii/S2588840418300209?via%3Dihub
UR - http://hdl.handle.net/10044/1/62334
VL - 1
ER -
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