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DIS Metallrugical Service evaluated DISFOR process as described in US Patent 9,095,891 and achived following propertise:

•AISI 4340 was used in experiments.

•Welded and quench and tempered journal of a crankshaft had impact properties 30 ft-lb at -20⁰F.

•Welded , DISFOR treated and Quench and tempered journal of the crankshaft had impact properties 58 ft-lb at -20⁰F.

•Welded, DISFOR treated , quench and tempered journal had the same mechanical properties as a solid crankshaft journal.

•Microstructure of welded , DISFOR treated , quench and tempered journal was the same or very similar to the microstructure of solid crankshaft having same thermal and forming history. There is no evidence of HAZ in welded , DISFOR treaded and quench and tempered journal. There is evidence of HAZ in welded and quench and tempered journal.

•Welded DISFOR treated crankshafts have continuous grain flow CGF.

•All impact, mechanical and microstructural testing were completed by independent metallurgical lab.

•All welding and DISFOR related processes were completed by US companies.