ANALYSE THE EFFECT OF CLAD RATIO ON STRESS STRAIN CURVE OF TITANIUM-CLAD BIMETALLIC STEEL FOR DIFFERENT STRAIN RATES AND TEMPERATURES USING JOHNSON-COOK MODEL

Abstract

Titanium–clad bimetallic steel plate finds its application in the construction of large pressure vessels which are used for storage and processing of petrochemicals. Mechanical properties can be imparted to any material according to its application by a technique known as cladding. To improve material, two main functions are performed by cladding. The first is to improve the material‘s surface properties like wear resistance in conditions like erosion, abrasion, and Corrosion. The second is to impart bulk-dependent properties like strength, hardness, etc. Titanium-clad bimetallic steel finds its application in various industrial fields like shipbuilding, construction of bridges and buildings, and high-pressure vessels used in the petrochemical industry. Titanium-clad steel enhances the service life of welded pipes as well as reduces the material cost. The finite element analysis (FEA) technique is an efficacious numerical method for solving several engineering problems. This technique not only provides reliable test results but also reduces the cost of the experiment. The aim of this report is to analyze the effect of clad ratio on stress-strain curves of titanium-clad bimetallic steels for different strain rates and different temperatures using the Johnson-Cook flow stress model. The ratio of the cladding layer thickness (tc) to the total thickness of Titanium-Clad bimetallic steel plate (t) is known as Clad ratio (α). In this report, Titanium Grade 5 is used as a cladding material and AISI 1006 is a parent metal. Furthermore, model constants were estimated from the analyzed result by using material constant for both cladding material and parent material from the research papers. The dimensions of the specimens were taken from GB/T228.1–2010 testing standard. The three-dimensional design of the specimens was created in Solidworks 20 and analyzed in Ansys Explicit Dynamics. A tension test was performed using Ansys for three different temperatures (293K,673K, and 973K) and for three different strain rates (1/sec, 100/sec, and 500/sec). In this report, the reference strain rate was taken as 1/sec and the reference temperature as 293K.