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Browsing by Subject "Residual stress"

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Determination of residual stresses in roll compacted titanium strips

Author: Mothosi, KL ; Chikosha, Silethelwe ; Madyira, DM ; Chikwanda, Hilda K Date: Jan 2017 Manufacturing processes typically produce residual stresses. The residual stresses can be advantageous when they are compressive and detrimental when tensile. In roll compaction of metal powder, similarly to rolling solid metals, substantial ... Read more
Evaluation of a high-temperature pre-heating system design for a large-scale additive manufacturing system

Author: Ramulifho, RD ; Gupta, K ; Glaser, Daniel Date: Sep 2022 Additive Manufacturing (AM) of titanium (Ti6Al4V) material using Selective Laser Melting (SLM) may generate significant residual stresses of a tensile nature, which can cause premature component failure. The Aeroswift platform is a large ... Read more c b n a
Laser shock peening on a 6056-T4 aluminium alloy for airframe applications

Author: Glaser, D ; Polese, C ; Bedekar, RD ; Plaisier, J ; Pityana, Sisa L ; Masina, Bathusile N ; Mathebula, T ; Troiani, E Date: Mar 2014 Laser Shock Peening (LSP) is a material enhancement process used to introduce compressive residual stresses in metallic components. This investigation explored the effects of different combinations of LSP parameters, such as irradiance ... Read more
Mechanical surface treatment studies by Bragg edge neutron imaging

Author: Ramadhan, RS ; Glaser, Daniel ; Soyama, H ; Kockelmann, W ; Shinohara, T ; Pirling, T ; Fitzpatrick, ME ; Tremsin, AS Date: Oct 2022 Mechanical surface treatment technologies such as laser peening and cavitation peening require detailed characterization, including residual stress analysis, to optimize their processing parameters. Recent developments at neutron facilities ... Read more
Residual stress in laser powder bed fusion

Author: Mugwagwa, L ; Yadroitsava, I ; Makoana, Nkutwane W ; Yadroitsev, I Date: May 2021 Laser powder bed fusion (L-PBF) has great prospects for biomedical, automotive, aerospace and other high-tech industry sectors due to its manufacturing flexibility and design freedom. However, several factors that include high residual stresses, ... Read more
Residual stress, porosity and surface roughness for laser powder bed fusion manufactured Ti6Al4V at high laser powers

Author: Makoana, Nkutwane W ; Yadroitsava, I ; Yadroitsev, I ; Du Plessis, A ; Tshabalala, Lerato C ; Pityana, Sisa L Date: Nov 2021 The use of high-powered lasers presents a unique opportunity to improve the LPBF productivity since a larger beam spot size and higher scanning speeds can be utilized to increase the process build rate. In this study, a custom-built LPBF ... Read more

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Browsing by Subject "Residual stress"

Browsing by Subject "Residual stress"

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