ResearchSpace
→
Browsing by Subject

Browsing by Subject "Heat treatment"

Now showing items 1-19 of 19

Application of shortened heat treatment cycles on A356 automotive brake calipers with respective globular and dendritic microstructures

Author: Moller, H ; Govender, G ; Stumpf, WE Date: Sep 2010 The conventional casting alloy A356 is probably one of the most popular alloys used for semi-solid metal (SSM) forming. This is due to its high fluidity and good castability. This alloy can be heat treated alternatively to the T4, T5 or T6 ... Read more
Axial fatigue behaviour of additively manufactured tool steels

Author: Tshabalala, Lerato C ; Sono, Oscar JH ; Makoana, Nkutwane W ; Masindi, J ; Maluleke, O ; Johnston, C ; Masete, Mosimanegape S Date: Jun 2020 Tool steels contain high-nickel and low-carbon content, consisting of alloying elements such as Ni, Co, Mo, Ti and Al. These tool steels exhibit excellent mechanical properties combining high strength with good toughness. The aim was to study ... Read more
Comparison of the heat treatment response of wrought and SSM-HPDC alloy 6082

Author: Möller, H ; Govender, G ; Stumpf, WE Date: Jun 2011 The natural and artificial aging responses of wrought and SSM-HPDC alloy 6082 are compared. It is shown that the heat treatment response of this Al-Mg-Si alloy is not influenced by differences in microstructures produced by different processing ... Read more
Effect of heat treatment on the properties of laser-beam welded rheo-cast F357 aluminum

Author: Theron, Maritha ; Knutsen, RD ; Ivanchev, LH ; Burger, HP Date: Feb 2012 Semi-solid metal rheo-cast F357 aluminum plates were joined by autogenous Nd:YAG laser welding and were welded in either the as-cast (F) condition, T4 temper or T6 temper condition. The weldability of this age-hardenable Al–7%Si–0.6%Mg casting ... Read more
Effect of Pre/Post T6 Heat Treatment on the Mechanical Properties of Laser Welded SSM Cast A356 Aluminium Alloy

Author: Akhter, R ; Ivanchev, L ; Burger, HP Date: Feb 2007 Aluminium alloy A356 was treated by the Rheo semi solid metal (SSM) process, developed recently by CSIR-Pretoria, and cast in plates using a high pressure die casting (HPDC) machine. Plates in as cast condition (F) and heat treated T6 condition ... Read more
Effect of solution heat treatment time on a rheocast Al-Zn-Mg-Cu alloy

Author: Mazibuko, NE ; Curle, UA Date: Jun 2011 During rheo-high pressure die casting (R-HPDC) of Al-Zn-Mg-Cu alloys a coarse eutectic phase is formed. This eutectic phase is difficult to take into solution because of its size and it would require longer solution heat treatment times. The ... Read more
Evaluation of heat treatment parameters on microstructure and hardness properties of high-speed selective laser melted Ti6Al4V

Author: Lekoadi, Paul M ; Tlotleng, Monnamme ; Annan, K ; Maledi, N ; Masina, Bathusile N Date: Feb 2021 This study presents the investigation on how heat treatment parameters, which are temperature, cooling method, and residence time, influence the microstructural and hardness properties of Ti6Al4V components produced on Ti6Al4V substrate using ... Read more
Improving the microstructure of high speed selective laser melted Ti6A14V components by varying residence time during heat treatment

Author: Lekoadi, Paul M ; Tlotleng, Monnamme ; Maledi, N ; Masina, Bathusile N Date: Nov 2019 Selective laser melting (SLM) is a powder bed additive manufacturing technique that produces components layerby-layer from computer aided designs as opposed to conventional manufacturing methods. Although this manufacturing technique offers ... Read more
Industrial heat treatment of R-HPDC A356 automotive brake callipers

Author: Chauke, L ; Moller, H ; Curle, UA ; Govender, S Date: Oct 2012 Heat treatment of rheo-high pressure die cast (R-HPDC) A356 brake callipers has produced good mechanical properties on the laboratory scale. An industrial heat treatment is required to evaluate the applicability and conformance of the R-HPDC ... Read more
Industrial heat treatment of R-HPDC A356 automotive brake callipers [Conference paper]

Author: Chauke, L ; Möller, H ; Curle, UA ; Govender, G Date: Oct 2012 Heat treatment of rheo-high pressure die cast (R-HPDC) A356 brake callipers has produced good mechanical properties on the laboratory scale. An industrial heat treatment is required to evaluate the applicability and conformance of the R-HPDC ... Read more
The influence of heat treatment and process parameters optimization on hardness and corrosion properties of laser alloyed X12CrNiMo steel

Author: Popoola, API ; Fatoba, OS ; Popoola, M ; Pityana, Sisa L Date: Oct 2016 Martensitic stainless steels are used in the production of steam turbine blades but their application is limited due to low hardness and poor corrosion resistance. Laser surface alloying and heat treatment of X12CrNiMo Martensitic stainless ... Read more
Insights on niobium micro-alloyed laser in situ synthesised gamma titanium aluminide alloys

Author: Tlotleng, Monnamme ; Pityana, Sisa L ; Motha, S Date: May 2023 The effects of micro-alloying gamma titanium aluminide ( -TiAl) with niobium (Nb) using a laser melt pool as a melting pot are reported. The Optomec LENS machine was used to carry out the laser in situ alloying experiments where Nb, ranging ... Read more
Investigation of martensite a’ phase transformation during heat treatment of high-speed selective laser melted Ti6Al4V components

Author: Lekoadi, Paul M ; Maledi, N ; Tlotleng, Monnamme ; Masina, Bathusile N Date: Feb 2020 The investigation of microstructural and hardness properties of high-speed selective laser melted (SLM) produced Ti6Al4V coupons after various heat treatments. Heat treatment was performed in order to homogenize and improve the microstructure ... Read more
Investigation of microstructural characteristics of heat treated high speed selective laser melting fabricated Ti6Al4V components

Author: Lekoadi, Paul M ; Maledi, N ; Tlotleng, Monnamme ; Masina, Bathusile N Date: Nov 2018 This study presents an investigation of the effect of different heat treatments on the microstructure of Ti6Al4V fabricated components produced by high speed selective laser melting. 10 mm x 10 mm x 10 mm cubes were heat treated in an inert ... Read more
Investigation of the T4 and T6 heat treatment cycles of semi-solid processed aluminium alloy A356

Author: Moller, H ; Govender, G ; Stumpf, WE Date: 2008 The heat treatment cycles that are currently applied to semi-solid processed components are mostly those that are in use for dendritic casting alloys. These heat treatments are not necessarily the optimum treatments. It is shown that a decrease ... Read more
Laser welding of SSM Cast A356 aluminium alloy processed with CSIR-Rheo technology

Author: Akhter, R ; Ivanchev, L ; Van Rooyen, Corney ; Kazadi, BP ; Burger, HP Date: 2006 Samples of aluminium alloy A356 were manufactured by Semi Solid Metals HPDC technology, developed recently in CSIR, Pretoria. They were butt welded in as cast conditions using as Nd: YAG laser. The best metal and weld microstructure were ... Read more
Optimisation of the solution heat treatment of Rheo-processed Al-Cu-Mg-(Ag) Alloys A206 and A201

Author: Masuku, EP ; Moller, H ; Knutsen, R ; Ivanchev, L ; Govender, G Date: Jun 2009 The traditional solution treatment cycles that are currently applied to rheo-processed A201 are mostly those that are used for conventional castings. These solution treatments are not necessarily the optimum solution treatments for rheo-processing. ... Read more
Phase transformation and microstructural control of the a-solidifying -Ti-45Al-2Nb-0.7Cr-0.3Si intermetallic alloy

Author: Mathabathe, Maria N ; Govender, Gonasagren ; Bolokang, Amogelang S ; Mostert, RJ ; Siyasiya, CW Date: May 2018 The -Ti-45Al-2Nb-0.7Cr-0.3Si based intermetallic alloy was developed. Microstructure evolution of the as-cast and heat-treated alloy yielded the spheriodised and Widmanstätten laths. High temperature differential thermal analysis (HTDTA) was ... Read more
Residual stress modelling and experimental analyses of Ti6Al4V ELI additive manufactured by laser engineered net shaping

Author: Ngoveni, AS ; Popoola, API ; Arthur, Nana KK ; Pityana, Sisa L Date: Mar 2019 This paper focus on the experimental analyses and modelling of the residual stresses build up during laser additive manufacturing by Laser Engineered Net Shaping. Currently, additive manufactured parts employ heat treatment for the reduction ... Read more

Now showing items 1-19 of 19

Browse

All of ResearchSpace

Quick Links

Legislation and compliance

General Enquiries

Tel: + 27 12 841 2911
Email: callcentre@csir.co.za

Physical Address
Meiring Naudé Road
Brummeria
Pretoria
South Africa

Postal Address
PO Box 395
Pretoria 0001
South Africa

Social Connect

Copyright © CSIR 2017. All Rights Reserved

Resources on this site are free to download and reuse according to associated licensing provision. Please read the terms and conditions of usage of each resource.