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<p>This article investigates the limit forming diagram (FLD) for three-layer aluminum sheets 1050 and titanium grade 1/aluminum 1050. This examination uses a combination of numerical and experimental approaches through a single-point incremental forming (SPIF) process. First, the 3-layer sheet was produced by a cold roll bonding process with 50% strain. First, the 3-layer sheets were fabricated using the cold bond rolling technique with a 50% rolling reduction. In the following, the effects of the tool diameter parameters, Step down, and feed rate were investigated experimentally and numerically by considering the design of the experiment method on the FLD, the thickness distribution, and the forming depth. The results showed that by increasing the diameter of the tool from 6 to 9&#xa0;mm, the formability improved, while with the increase in the step-down, the formability decreased. The thickness distribution test was done experimentally and numerically, and the simulation results agreed with the experiment.</p> Graphical Abstract <p></p>

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Numerical and experimental study of forming limit diagrams during single point incremental forming for Al/Ti/Al sheets

  • 期刊论文

  • 发表日期：

    2026年4月13日

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  • Payam Tayebi,
  • Mostafa Mahmoodi Meymand,
  • Mohsen Sajadian,
  • Ramin Hashemi

摘要

This article investigates the limit forming diagram (FLD) for three-layer aluminum sheets 1050 and titanium grade 1/aluminum 1050. This examination uses a combination of numerical and experimental approaches through a single-point incremental forming (SPIF) process. First, the 3-layer sheet was produced by a cold roll bonding process with 50% strain. First, the 3-layer sheets were fabricated using the cold bond rolling technique with a 50% rolling reduction. In the following, the effects of the tool diameter parameters, Step down, and feed rate were investigated experimentally and numerically by considering the design of the experiment method on the FLD, the thickness distribution, and the forming depth. The results showed that by increasing the diameter of the tool from 6 to 9 mm, the formability improved, while with the increase in the step-down, the formability decreased. The thickness distribution test was done experimentally and numerically, and the simulation results agreed with the experiment.

Graphical Abstract