TY - JOUR
T1 - Multi-mode distortion behavior of aluminum alloy thin sheets in immersion quenching
AU - Li, Z. X.
AU - Zhan, M.
AU - Fan, X. G.
AU - Wang, X. X.
AU - Ma, F.
AU - Li, R.
N1 - Publisher Copyright:
© 2019
PY - 2020/5
Y1 - 2020/5
N2 - Aluminum alloy thin sheets are widely used to produce light-weight high-strength components and the sheets are generally quenched before forming (Q-F) to improve the final mechanical properties of components. However, the distortion in quenching will significantly affect the quality and stability of the following forming process. In this study, the distortion behavior of 2219 aluminum alloy thin sheets and its forming mechanism in quenching process were investigated through experiments and finite element analysis (FEA). The results indicate that, the quenched thin sheets basically present three distortion modes, namely saddle-shape, shovel-shape and arch-shape. The distortion modes of the quenched thin sheets are determined by the bending modes of distortion zone which is the zone of the thin sheet near the water surface. When the bending mode is one-half sine wave, the quenching thin sheets always show saddle-shape. However, for the cases where the bending mode changes to three-half sine wave and the bending of distortion zone is suppressed, the quenching thin sheets show shovel-shaped and arch-shaped distortion modes, respectively. The reasons behind the variations of the bending mode are finally analyzed based on a buckling criterion under laterally constrained conditions. These results will provide an in-depth understanding of quenching distortion behavior and lay a basic guidance for controlling the distortion of thin sheets in quenching process.
AB - Aluminum alloy thin sheets are widely used to produce light-weight high-strength components and the sheets are generally quenched before forming (Q-F) to improve the final mechanical properties of components. However, the distortion in quenching will significantly affect the quality and stability of the following forming process. In this study, the distortion behavior of 2219 aluminum alloy thin sheets and its forming mechanism in quenching process were investigated through experiments and finite element analysis (FEA). The results indicate that, the quenched thin sheets basically present three distortion modes, namely saddle-shape, shovel-shape and arch-shape. The distortion modes of the quenched thin sheets are determined by the bending modes of distortion zone which is the zone of the thin sheet near the water surface. When the bending mode is one-half sine wave, the quenching thin sheets always show saddle-shape. However, for the cases where the bending mode changes to three-half sine wave and the bending of distortion zone is suppressed, the quenching thin sheets show shovel-shaped and arch-shaped distortion modes, respectively. The reasons behind the variations of the bending mode are finally analyzed based on a buckling criterion under laterally constrained conditions. These results will provide an in-depth understanding of quenching distortion behavior and lay a basic guidance for controlling the distortion of thin sheets in quenching process.
KW - Aluminum alloy thin sheets
KW - Finite element analysis
KW - Immersion quenching
KW - Quenching distortion behaviors
UR - http://www.scopus.com/inward/record.url?scp=85077085460&partnerID=8YFLogxK
U2 - 10.1016/j.jmatprotec.2019.116576
DO - 10.1016/j.jmatprotec.2019.116576
M3 - 文章
AN - SCOPUS:85077085460
SN - 0924-0136
VL - 279
JO - Journal of Materials Processing Technology
JF - Journal of Materials Processing Technology
M1 - 116576
ER -