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← ScienceWhich risk increases when a laser welding system loses precise focus on HY100 steel?
A)Reduced depth of heat affected zone
B)Increased hydrogen embrittlement susceptibility✓
C)Elevated material deposition temperature required
D)Lower peak ultimate tensile strength results
💡 Explanation
Increased hydrogen embrittlement susceptibility occurs because lower power density causes slower cooling, therefore allowing more hydrogen diffusion and trapping via the Thermal Diffusion mechanism within the steel, rather than rapid solidification reducing diffusion.
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