TRIZ approach for machining process innovation in cryogenic environment

A. Ghani, Jaharah and A. Raof, Natasha and Che Haron, Che Hassan and Junaidi, Syarif (2016) TRIZ approach for machining process innovation in cryogenic environment. International Journal of Materials and Product Technology, 53 (3-4). pp. 286-297. ISSN 0268-1900 E-ISSN 1741-5209

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Abstract

This paper presents the utilisation of TRIZ approach in machining process of AISI 4340 in cryogenic environment which lead to product improvement in turning process. The machining study is carried out in two stages; FEM simulation for finding the optimum condition and machining experiment to visualise the product improvement that involved plastic deformation. The simulation result revealed that at moderate to high cutting speed, high feed rate and high depth of cut will result in high temperature that enable for the change in phase of AISI 4340 from retained austenite to fully martensite. A sample from machining experiment at optimum cutting condition found that the microstructure changes beneath the machined until at the depth of ∼7 μm with high hardness to 8,500 N/mm2 Martens hardness at the machined surface. This hardness is equivalent to the hardness obtained in conventional case hardening process that is required after the machining of AISI 4340 in their application as automotive engine parts in order to enhance these parts in their service lives. This study reveals that the TRIZ approach helps to systematically analyse the various outcomes in this study started with process limitation, problem identification, axiomatic and Su-field analysis.

Item Type:	Article (Journal)
Additional Information:	6391/45963
Uncontrolled Keywords:	Cryogenic Turning; High Hardness.; Machining Process For Product Improvement; TRIZ
Subjects:	T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Natasha A. Raof
Date Deposited:	26 Nov 2015 10:13
Last Modified:	18 Dec 2018 12:13
URI:	http://irep.iium.edu.my/id/eprint/45963

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