TY  - JOUR
T1  - Microstructure and Mechanical Properties of DC-LSND Double
Cooling on A-36 Steel Welded Joints
AU - Wibowo, H. AU - Ilman, M.N. AU - Iswanto, P.T. 
JO  - Journal of Engineering and Applied Sciences
VL  - 13
IS  - 17
SP  - 7341
EP  - 7347
PY  - 2018
DA  - 2001/08/19
SN  - 1816-949x
DO  - jeasci.2018.7341.7347
UR  - https://makhillpublications.co/view-article.php?doi=jeasci.2018.7341.7347
KW  - DC-LSND double cooling
KW  -welded joints
KW  -distortion
KW  -liquid nitrogen
KW  -microstructure
KW  -refined
AB  - The use of certain welding techniques to reduce distortion in the welding of thin plates to the hull
of a ship has become one of the most recent objects of research. One of the alternative welding techniques
developed is called the DC-LSND (Dynamically Controlled Low Stress No-Distortion) technique. The
investigation concerned here was aimed at studying the effect of DC-LSND double cooling on the distortion,
microstructure and mechanical properties in A36 steel welded joints. The DC-LSND double cooling treatments
were performed by cooling the HAZ (Heat Affected Zone) behind the welding torch by using cryogenic liquid
nitrogen. A sequence of tests was carried out involving distortion measurement, microstructure examination,
hardness measurement and tensile testing in combination with SEM fractography. The results showed
that DC-LSND double cooling treatments affected transverse distortion significantly. The strength of the
welded joint was improved by the DC-LSND double cooling treatments, based on the results of the tensile
testing and the hardness. The microstructure was also refined by increasing the acicular ferrite phase.
ER  -