Evaluation of Local Tensile Properties of Bi-Metallic Weld Joints by Small Tensile and Ball Indentation Tests

2007 ◽  
Vol 353-358 ◽  
pp. 2073-2076
Author(s):  
Jin Won Kim ◽  
Jong Sun Park ◽  
Jong Sung Kim ◽  
Tae Eun Jin
Keyword(s):  
Weld Metal ◽  
Tensile Properties ◽  
Ferritic Steel ◽  
Indentation Test ◽  
Ultimate Tensile Stress ◽  
Base Metals ◽  
Weld Joints ◽  
Ball Indentation ◽  
Indentation Tests ◽  
Ball Indentation Test

This study performed tensile test using small-size flat specimen and ball indentation test at room temperature to characterize the local tensile properties of bi-metallic weld joints. The weld specimens used were fabricated by joining between SA508 Gr.3 ferritic steel and Type 316 stainless steel with Alloy 82 buttering on the ferritic steel side and Alloy 82/182 weld metal. The test results showed that yield stress (YS) of weld metal was slightly higher than that of Type 316 and smaller than that of SA508 Gr.3, and ultimate tensile stress (UTS) of weld metal was similar as those of Type 316 and SA508 Gr.3 base metals. Also, the values of YS and UTS of buttering layer (Alloy 82) were nearly same as those of weld metal. Heat-affected-zones (HAZs) showed higher YS and UTS values compared to their base metals. Especially, the strengths of SA508 Gr.3 were significantly higher than those of surrounding materials. Also, it was known that the ball indentation test reasonably measured the local YS and UTS of bi-metallic weld joints.

Application of Ball Indentation Technique for Mechanical Properties Estimation of Bi-Metallic Weld

2012 ◽  
Vol 585 ◽  
pp. 342-346 ◽  
Author(s):  
Kamal Sharma ◽  
Harshit Kumar Khandelwal ◽  
Vivek Bhasin ◽  
Rahul Chhibber
Keyword(s):  
Weld Metal ◽  
Ferritic Steel ◽  
Indentation Test ◽  
Ultimate Tensile Stress ◽  
Test Results ◽  
Base Metals ◽  
Ball Indentation ◽  
Ball Indentation Test ◽  
304Ln Stainless Steel ◽  
Type 304

This work studied the ball indentation test at room temperature to characterize the local tensile properties of bi-metallic weld joints. The weld specimens used were fabricated by joining between SA 508 Gr. 3 ferritic steel and Type 304LN stainless steel with Alloy 82 buttering on the ferritic steel side and Alloy 82/182 weld metal. The test results showed that yield stress (YS) of weld metal was slightly higher than that of Type 304 and smaller than that of SA508 Gr.3, and ultimate tensile stress (UTS) of weld metal was similar as those of Type 304 and SA508 Gr.3 base metals. Also, the values of YS and UTS of buttering layer (Alloy 82) were nearly same as those of weld metal. Heat-affected-zones (HAZs) showed higher YS and UTS values compared to their base metals.

Ball-indentation test technique for evaluating thermal and creep damage of modified 9Cr-1Mo steel

2010 ◽  
Vol 63 (2-3) ◽  
pp. 431-436 ◽  
Author(s):  
V. Karthik ◽  
K. Laha ◽  
K. S. Chandravathi ◽  
P. Parameswaran ◽  
K. V. Kasiviswanathan ◽  
...  
Keyword(s):  
Indentation Test ◽  
Creep Damage ◽  
Test Technique ◽  
Ball Indentation ◽  
Ball Indentation Test

Statistical Analysis of Experimental Parameters in Continuous Indentation Tests Using Taguchi Method

2003 ◽  
Vol 125 (4) ◽  
pp. 406-411 ◽  
Author(s):  
Eun-chae Jeon ◽  
Joo-Seung Park ◽  
Dongil Kwon
Keyword(s):  
Taguchi Method ◽  
Tensile Properties ◽  
Indentation Depth ◽  
Signal To Noise Ratio ◽  
Indentation Test ◽  
Indentation Load ◽  
Optimum Parameters ◽  
Experimental Parameters ◽  
Indentation Tests ◽  
Continuous Indentation

The continuous indentation test, which applies an indentation load to a material and records the indentation depth, yields indentation tensile properties whose accuracy can vary depending on such experimental parameters as number of unloadings, unloading ratio, maximum depth ratio and indenter radius. The Taguchi method was used to quantify their effects and to determine their optimum values. Using signal-to-noise ratio calculated from the error in the indentation tensile properties, the criterions and the optimum values for the experimental parameters were presented. The indentation tensile properties evaluated with the optimum parameters were in better agreement with the tensile properties.

Increase of Weld Joint Efficiency of the Combined Band of a High-Speed Rotor of an Electric Machine by Local Strengthening

2020 ◽  
Vol 299 ◽  
pp. 370-375
Author(s):  
Egor V. Terentyev ◽  
Artem Yu. Marchenkov ◽  
Andrey P. Sliva
Keyword(s):  
Heat Treatment ◽  
Tensile Stress ◽  
Weld Metal ◽  
High Speed ◽  
Electron Beam Welding ◽  
Ultimate Tensile Stress ◽  
Electric Machine ◽  
Weld Width ◽  
Weld Joints ◽  
36Nkhtyu Alloy

The research shows the possibility of increasing the structural strength of the weld joints of EP517 steel and 36NKhTYu iron-nickel alloy as applied to the combined bandage of the high-speed rotor of an electric machine, due to the effect of local strengthening of the soft interlayer. The technology of electron-beam welding of 36NKhTYu alloy to EP517 steel with free root formation, which allows to obtain narrow welds, is described. The results of metallographic researches and mechanical tests of weld joints with different weld widths are presented, which showed that the structure and properties of the weld metal on samples with different weld widths are almost identical. The tension test results of weld joints demonstrate a significantly greater ultimate tensile stress, compared to the ultimate tensile stress of the weld metal. Also, it was established that, due to the local strengthening phenomena the smaller the weld width, the stronger the welded joint is. In addition, the use of heat treatment after welding allows us to increase the strength properties of the weld metal and the heat-affected zone of the 36NKhTYu alloy, due to the formation of the hardening γ’-phase. The possibility of increasing the ultimate tensile strength of the weld up to 98% of the ultimate tensile stress value of EP517 steel (as the less durable of both welded materials), due to heat treatment and reducing the weld width, is demonstrated.

In-Situ Damage Evaluation Using Ball Indentation Test Method

2010 ◽  
Author(s):  
Raghu V. Prakash
Keyword(s):  
True Strain ◽  
Base Material ◽  
Indentation Test ◽  
Test Method ◽  
Fatigue Properties ◽  
Invasive Test ◽  
Ball Indentation ◽  
Loading And Unloading ◽  
Ball Indentation Test

Automated ball indentation is a semi-invasive test method that is gaining importance as a field test method in the recent times. Based on the few cycles of loading and unloading, and corresponding load, deflection characteristics, it is possible to estimate the true stress-true strain information of a material. In the present work, ball indentation has been used to evaluate the static and fatigue properties of base material as well as material subjected to different types of damage, such as fatigue, weldment etc. The tensile properties and fatigue properties were found to be affected by the prior damage history.

Sign in / Sign up

Export Citation Format

Share Document