Effect of cryogenic treatment on the hardness and tensile behaviour of AISI 4140 steel Online publication date: Wed, 09-Nov-2011
by D. Senthilkumar; I. Rajendran; Massimo Pellizzari
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 6, No. 5, 2011
Abstract: This paper deals with the influence of cryogenic treatment on the hardness and tensile behaviour of AISI 4140 steel. The impetus for studying the tensile properties of steels is to ensure that steels used in shafts and gears have sufficient tensile strength to prevent failure when they are subjected to tensile or fatigue loads, and to provide basic design information on the strength of 4140 steel. A comparative study on the effects of deep cryogenic treatment (DCT, 77 K × 5 h) and conventional heat treatment (CHT) was made by means of hardness and tension testing. Fracture features of tensile specimens were also compared. It has been shown that the hardness of shallow and deep cryogenically treated specimens are higher whereas the tensile strength of the shallow and deep cryogenically treated specimens are lower when compared to that of conventionally treated steel. The transformation of retained austenite to martensite is responsible for present result.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Microstructure and Materials Properties (IJMMP):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook