Effect of Cryogenic Treatment on Mechanical Properties of AISI 4340 and AISI 4140 Steel
Journal Title: Mehran University Research Journal of Engineering and Technology - Year 2019, Vol 38, Issue 3
Abstract
From last epoch till to date, AISI 4340 and AISI 4140 have been widely used in different engineering applications. These applications include bolt, screws, gears, drive shafts, crane shaft and piston rods for engines due to its upright mechanical properties, cost-effective and easily available in market. In present work, deep cryogenic treatment effect on the mechanical properties of AISI 4340 and AISI 4140 have been studied. Present work was carried out at laboratory scale and can be extended for mass production. Our work is simple, straight forward safe and economical. In our work, samples were heat treated in simple muffle furnace and followed by cryogenic treatment in liquid nitrogen. Before cryogenic treatment, all samples were normalized at 860°C to obtain homogenized microstructure. Samples were also compared conventionally heat treatment with quenched in oil quenchant. Experimental results showed that after cryogenic treatment with tempering treatment, one could easily increase the tensile strength, impact toughness and hardness. Advanced optical microscopy (IMM 901) and SEM (Scanning Electron Microscopy), FIT Quanta 200 methods have also been deployed to reveal and interpret the internal structure of samples. It was found from microstructure that cryogenic treated sample increases the impact strength, hardness and tensile strength as compared conventional heat treated quenching approaches.
Authors and Affiliations
A. R. Jamali, W. Khan, A. D. Chandio, Z. Anwer, M. H. Jokhio
Keywords
Related Articles
- EP ID EP636615
- DOI 10.22581/muet1982.1903.18
- Views 113
- Downloads 0
Estimation of Energy Potential from Organic Fractions of Municipal Solid Waste by Using Empirical Models at Hyderabad, Pakistan.
MSW (Municipal Solid Waste) now-a-day is considered as a precious renewable energy resource for various purposes. In view of above fact, one hundred samples of MSW were collected from different locations of study area. Q...
Enabling the Usability Heuristics of Agile Base Systems to Improve Quality of Local Software Industry
Many agile software development practices are promoted to improve the quality of software products. In recent years agile software development overlooked the usability features that effected system productivity.Usability...
Antecedents of Enterprise Resource Planning and its Impact on Firm Perfromance with Supply Chain Integration as Mediating factor
In today's knowledge based globalized business world, the contemporary organizations are thriving to apply the innovative as well as modern business techniques and tools in their products and processes regularly. Besides...
Effective Image Segmentation using Composite Energy Metric in Levelset Based Curve Evolution
The linguistic corpus of Sindhi language is significant for computational linguistics process, machine learning process, language features identification and analysis, semantic and sentiment analysis, information retriev...
A Comparative Analysis of Linear and Nonlinear Semi-Active Suspension System
The ride quality including comfort and safety is the primary factor that is targeted in the design of an effective suspension system. The parametric behavior of suspension system is non-linear but for simplicity most of...