The Advances in Joining Technology by Mokhtar Awang

Author:Mokhtar Awang
Language: eng
Format: epub, pdf
Publisher: Springer Singapore, Singapore

In above equation, F is the applied force (kgf), D is diameter of indenter (mm) and d is diameter of indentation (mm).

Figure 7 showed the hardness results for the specimens with different welding currents. From the result, the hardness of the HAZ did not grow until it reached the base material. The highest value of BHN for base metal was 187 that by specimens with welding current 90, 100 and 110 A with angle of bevel was 45° and no bevel. The highest value of BHN for HAZ area was 170 A shown by specimens with welding parameters 100 A at no bevel, 110 A at 45° bevel angle and 120 A both with no angle and 45° bevel angle. The result data showed that 120 A was the highest value of BHN on the HAZ area. High BHN values show that the indention diameter is small. This means that, the strength of the specimen or material surface is great.

Fig. 7Hardness Brinell number versus welding current

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