For the stress released bolts, the decrease of residual stress and readjustment of stresses fields in the bolt head after thermal treatment prolonged the nucleation time of a crack.

• 经应力消除热处理后之螺栓，由于加工变形所造成之应力场，但于长时间热能帮助下，得以重新调适而降低组织中之残留应力，减缓腐蚀开裂之时间；