Characterization of laser metal deposited 316L stainless steel
- Authors: Bayode, A. , Akinlabi, Esther Titilayo , Pityana, S.
- Date: 2016
- Subjects: Laser metal deposition , Microhardnes , Stainless steel
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/92382 , uj:20223 , Citation: Bayode, A., Akinlabi, E.T. & Pityana, S. 2016. Characterization of laser metal deposited 316L stainless steel.
- Description: Abstract: Laser metal deposition (LMD) is an innovative manufacturing technique that uses laser to melt powders to fabricate fully dense components layer by layer. It is capable of processing different metallic powders and can also be used for consolidating different powder to produce custom alloys or functionally graded materials (FGM). The properties of laser processed materials is dependent on the final microstructure of the parts which in turn is dependent on the LMD processing parameters. This study investigates the effects of laser power on the structural integrity, microstructure and microhardness of laser deposited 316L stainless steel. The result showed that the laser power has much influence on the evolving microstructure and microhardness of the components. The average microhardness of the samples were observed to decrease as the laser power increased due to grain coarsening.
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Influence of laser power on microstructure of laser metal deposited 17-4 ph stainless steel
- Authors: Adeyemi, A.A. , Akinlabi, Esther Titilayo , Mahamood, R.M. , Sanusi, K.O. , Pityana, S. , Tlotleng, M.
- Date: 2017
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/244692 , uj:25306 , Citation: Adeyemi, A.A. et al. 2017. Influence of laser power on microstructure of laser metal deposited 17-4 ph stainless steel.
- Description: Abstract: The influence of laser power on the microstructure of 17-4 PH stainless steel produced by laser metal deposition was investigated. Multiple-track of 17-4 stainless steel powder was deposited on 316 stainless steel substrate using laser metal deposition, an additive manufacturing process. In this research, laser power was varied between 1.0 kW and 2.6 kW with scanning speed fixed at 1.2 m/s. The powder flow rate and the gas flow rate were also kept constant at values of 5 g/min and 2 l/min respectively. The microstructure was studied under optical microscope and it revealed that the microstructure was dendritic in structure with finer and lesser δ-ferrite at low laser power while the appearance of coarse and more δ-ferrite are seen at higher laser power.
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Microstructure and microhardness of 17-4 ph stainless steel made by laser metal deposition
- Authors: Bayode, A. , Akinlabi, Esther Titilayo , Pityana, S.
- Date: 2016
- Subjects: Additive manufacturing , Laser metal deposition , Microstructure
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/214385 , uj:21275 , Citation: Bayode, A., Akinlabi, E & Pityana, S. 2016. Microstructure and microhardness of 17-4 ph stainless steel made by laser metal deposition.
- Description: Abstract: Laser metal deposition (LMD) is an additive manufacturing process. Unlike conventional manufacturing process which is subtractive, LMD produces part layer by layer from the ground up and has been used to fabricate fully dense components using a variety of metallic powders. This paper investigates the evolving properties of laser deposited 17- 4PH stainless steel. The microstructure was martensitic with a dendritic structure. The average microhardness of the samples was found to be less than their wrought counterpart.
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