Advancing Cold Roll Bonding Efficiency by preceding XHV-Adequate Laser Deoxidation

# Surface Roughness and Critical Deformation Dataset

This supplementary Dataset contains experimental data related to surface roughness measurements and critical deformation analysis for cold roll bonding (CRB) processes under extreme high vacuum-adequate (XHV-adequate) conditions. The data supports research on laser-induced surface modifications and their impact on bond formation between aluminum EN AW-1050 and oxygen-free copper (OFC) sheets.

# Data Structure

```
├── roughness/ # Original Excel and csv format
│ ├── new_Analyse_Al_20x_Messung der Oberflächenrauheit_edit.xlsx
│ ├── new_Analyse_Al_20x_Messung der Oberflächenrauheit_edit.csv
│ └── new_Analyse_Cu_20x_Messung der Oberflächenrauheit_edit.xlsx
│ └── new_Analyse_Cu_20x_Messung der Oberflächenrauheit_edit.csv
└── critical_deformation/ # Original Excel and csv format
└── crit_deformation_Data.xlsx
└── crit_deformation_Data.csv
```

# Dataset Description

The dataset is available in both original Excel format and open-access CSV format for maximum accessibility and reusability.

## Surface Roughness Measurements
Located in `/roughness/` directory:

- `new_Analyse_Al_20x_Messung der Oberflächenrauheit_edit.xlsx/.csv`: Surface characterization of aluminum EN AW-1050 specimens
- CLSM measurements at 20x magnification
- Surface roughness parameters (Sa, Sz)
- Surface topography data for different laser overlap settings (0%, 20%, 40%, 60%)
- Laser treatment parameters: 180 μJ pulse energy, 700 kHz PRF, 44 μm spot size

- `new_Analyse_Cu_20x_Messung der Oberflächenrauheit_edit.xlsx/.csv`: Surface characterization of oxygen-free copper specimens
- CLSM measurements at 20x magnification
- Surface roughness parameters (Sa, Sz)
- Surface topography data for different laser overlap settings (0%, 20%, 40%, 60%)
- Laser treatment parameters: 400 μJ pulse energy, 510 kHz PRF, 35 μm spot size

## Critical Deformation Analysis
Located in `/critical_deformation/` directory:

- `crit_deformation_Data.xlsx/.csv`: Critical reduction data for bond formation
- Critical deformation values for different surface treatments
- Comparison between laser-treated (0.5% minimum) and brushed surfaces (19%)
- Data for sigmoid fitting analysis
- Process conditions under XHV-adequate atmosphere (pO2 < 10^-15 Vol.-%)

# Experimental Conditions

- Material thickness: 1 mm for both Al and Cu sheets
- Atmosphere: Argon-monosilane mixture for XHV-adequate conditions
- Rolling speed: 0.02 m/s
- Roll diameter: 65 mm

# Key Findings

The dataset demonstrates:
- Significant reduction in critical deformation (εcrit) from 19% (brushed) to 0.5% (laser-treated)
- Correlation between laser parameters and surface morphology
- Enhanced interfacial behavior in laser-treated specimens
- Synergistic effects between laser surface modification and XHV-adequate conditions

# Citation

When using this dataset, please cite:

Barienti, K., Janthur, F.-L., Heimers, H., Seffer, S., Hermsdorf, J., Herbst, S., Overmeyer, L., Maier, H.J., Nürnberger, F., 2025. Advancing cold roll bonding efficiency by preceding XHV-adequate laser deoxidation. Manufacturing Letters 44, 42–46. https://doi.org/10.1016/j.mfglet.2025.03.002

# Funding

This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—Project-ID 394563137 SFB1368.