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Mar 20 – 23, 2023
Campus Garching
Europe/Berlin timezone

Residual stresses in the bronze matrix composite surface deposits after laser melting injection

Mar 20, 2023, 4:00 PM
Yards 4 - 6 (Fakultät für Maschinenwesen)

Yards 4 - 6

Fakultät für Maschinenwesen

Board: MO-273
Poster Engineering applications Poster Session MONDAY


Xingxing Zhang


Wear causes a loss of 2% to 7% of the gross national product in industrialized countries [1]. Therefore, developing wear-resistant coatings and optimizing their manufacturing processes are essential. A novel metal matrix composite (MMC) coating has been developed via laser melting injection (LMI) technique over the last few years, which consists of a bronze matrix and tungsten fused carbides. Tribological tests have shown that this MMC coating has the potential to reduce wear by ~80% [2].
However, macro and micro residual stresses exist in the MMC coatings, which significantly affect the performance of the MMC coatings, such as causing dimensional distortion, reducing the fatigue strength and service life [3]. Therefore, it is critical to characterize the residual stresses in the MMC coatings.
In this research, the residual stresses in the LMI bronze matrix composite surface deposits were measured via neutron diffraction experiments. The residual stresses along the depth direction from the surface of the deposit to the center of the sample were determined nondestructively due to the large penetration depth of neutrons. A thermo-mechanical finite element model was developed. This combined experiment and simulation study provides a detailed insight into the residual stress state in the LMI MMC coatings. The results will be helpful in optimizing the laser processing and tailoring the residual stress.

[1] GfT (Gemeinschaft für Tribologie e.V.), https://www.gft-ev.de/en/what-is-tribology/, accessed on 28.01.2021.
[2] H. Freiße, A. Langebeck, H. Köhler, T. Seefeld, Dry Metal Forming Open Access Journal 2 (2016) 001-006.
[3] G.A. Webster, A.N. Ezeilo, International Journal of Fatigue 23 (2001) S375-S383.

Primary author


Ms Anika Langebeck (BIAS – Bremer Institut fuer angewandte Strahltechnik GmbH) Mr Erik Walz (Technical University of Munich) Joana Rebelo Kornmeier Michael Hofmann Mr Vladimir Luzin (Australian Nuclear Science and Technology Organisation)

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