4.6 Article

Effect of fractal parameters on optical properties of cold rolled aluminum alloy strips with induced surface deflection: Simulations and experimental correlations

Journal

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2019.116554

Keywords

3D formula for fractal surface morphology; Induced deflection angle after rolling; Fractal dimensions and periodic lengths of rolled surface; Optical properties in reflection

Funding

  1. China Steel Corporation (CSC), Kaohsiung, Taiwan, ROC
  2. Micro/Nano Tribology Laboratory, National Cheng Kung University, Tainan, Taiwan, ROC
  3. Ministry of Science and Technology, Taiwan, ROC [107-2221-E-006-092]

Ask authors/readers for more resources

Cold rollings for Al5182 aluminum alloy strips are carried out to evaluate the optical parameters with the applications of two lubricants and various operating conditions. In order to obtain these optical parameters, the fractal parameters which includes periodic lengths (L-x, L-y) and fractal dimensions (D-x, D-y) in the modified three-dimensional formula for the fractal surface morphology have been solved first for the rolled surfaces. This three-dimensional formula can provide an effective way to correlate these fractal parameters with the optical parameters using TracePro software, which can help to define rolling conditions efficiently for the specific demand of optical properties. The deterministic results for fractal surface simulations using MATLAB in series and 20 incident angle simulation in TracePro software explain that an increase in D-x and D-y will yield dense profiles which elevates the maximum illuminance and lower down the minimum illuminance. While an increment in L-x and L-y would increase the characteristic distance between two predominant asperities and increase minimum illuminance and decrease maximum illuminance. Finite element analyses prove that different friction coefficients in the upper and lower rolls potentially induce surface deflection and thus affect the optical properties. A high illuminance uniformity can be achieved by making a compromise among the fractal parameters (D-x, D-y, L-x and L-y) such that a small difference in the maximum and minimum illuminances is available.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available