Partner: Ming Ming


Ostatnie publikacje
1.Liu X., Jin S., Ming M., Fan C., Liu H., Politis D.J., Kopeć M., A high throughput in-situ measurement of heat transfer in successive non-isothermal forming of sheet alloys, Journal of Manufacturing Processes, ISSN: 1526-6125, DOI: 10.1016/j.jmapro.2024.08.048, Vol.129, pp.77-91, 2024

Streszczenie:

The measurement and control of the heat transfer of sheet alloys in successive non-isothermal forming cycles is crucial to achieve the desired post-form properties and microstructure, which could not as of yet be realized by using traditional test facilities. In the present research, a novel heat transfer measurement facility was designed to generate and subsequently measure the in-situ heat transfer from a sheet alloy to multi-mediums such as forming tools, air, lubricant and coating. More importantly, the facility was able to use a single sheet alloy sample to perform successive non-isothermal forming cycles, and subsequently obtain high throughput experimental results including the temperature evolution, cooling rate, mechanical properties and microstructures of the alloy. The high throughput in-situ heat transfer measurement facility identified that the cooling rate of AA7075 was 152 °C/s and the mechanical strength was over 530 MPa in the 1st forming cycle. However, it decreased to less than the critical value of 100 °C/s in the successive 10th forming cycle, leading to a low mechanical strength of only 487 MPa. The identified variations that occur in the successive non-isothermal forming cycles would improve the consistency and accuracy of part performance in large-scale manufacturing.

Słowa kluczowe:

High throughput in-situ measurement,Heat transfer,Successive non-isothermal forming,Sheet alloys,Microstructure

Afiliacje autorów:

Liu X.-Imperial College London (GB)
Jin S.-other affiliation
Ming M.-other affiliation
Fan C.-other affiliation
Liu H.-Imperial College London (GB)
Politis D.J.-Imperial College London (GB)
Kopeć M.-IPPT PAN
140p.