Which of the following welding practices is most likely to produce a crystallization failure on a repair of tempered frame rail?
A) welding too slowly
B) not allowing sufficient cooling time between weld runs
C) insufficient penetration
D) using a vertical-up welding technique

Question

Quizplus · Accepted Answer

Not allowing sufficient cooling time between weld runs can lead to excessive heat buildup in the material. This can alter the microstructure of tempered materials, leading to crystallization failures due to the rapid cooling and reheating cycles that do not allow the material to properly temper or stress relieve.

Which of the Following Welding Practices Is Most Likely to Produce