AISI 304 Welding Fracture Resistance by a Charpy Impact Test with a High Speed Sampling Rate

Bambang Riyanta,Moch Agus Choiron,Yudy Irawan,I Wardana

doi:10.3390/met7120543

Bambang Riyanta, Moch Agus Choiron + Show 2 more

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https://doi.org/10.3390/met7120543

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Abstract

The purpose of this study was to evaluate fracture resistance in AISI 304. The J-R curve was constructed from data, which resulted from an impact test by Charpy Impact machine equipped with high-speed sampling rate data acquisition equipment. The critical values of fracture resistance in fusion zones (FZ), high temperature heat affected zones (HTHAZ), low temperature heat affected zones (LTHAZ) and unaffected base metals (UBM) were obtained by calculation methods using some formulas and by graphical methods. Laboratory experiments demonstrated the relationships among the values of energy absorption along the impact test with the obstruction of dislocation movement due to the presence of chromium interstitial solute in all zones and chromium rich carbide precipitates in fusion zones and heat affected zones.

Highlights

The critical values of such fracture parameters are known as fracture resistance
Fracture resistance is the ability of a ductile material to accept load or deform plastically and resist fractures in the presence of cracks based on the Elastic Plastic Fracture Mechanics (EPFM) approach [1,2,3]
7, 543presented in Figure 5 is one of the Charpy Impact test results, representing six other similar results for figures of Charpy Impact tests on seven specimens for each zone

Summary

Introduction

The critical values of such fracture parameters are known as fracture resistance. Fracture resistance is the ability of a ductile material to accept load or deform plastically and resist fractures in the presence of cracks based on the Elastic Plastic Fracture Mechanics (EPFM) approach [1,2,3]. J-R curves have been widely used to measure the fracture resistance, and their determination has been standardized in ASTM. The recommended specimen in the standard were fatigue pre-crack [C(T)] and [SE(B)] specimen. Load versus load line displacement were recorded by digital instruments or autographically by x-y plotter. The record of load versus displacement was used to determine crack length. Since Load P, displacement v and crack length have been estimated at each data point, referring to ASTM E 1820, J could be evaluated to construct J-R curves

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