本文介绍了焊接残余应力对金属结构的静强度、脆性断裂以及应力腐蚀开裂的影响。
The paper discusses over the influence exerted by welding residual stress on the static strength, brittle fracture and stress-corrosion cracking of metal structure.
钻杆接头的各种纵向开裂属于低应力脆性断裂。
Longitudinal crack of drill pipe box joint is brittle fracture at low stress.
材料的脆化及较大的应力导致压球辊最终的脆性断裂。
The material embrittlement and residual stress leads to the final brittle fracture of the ball roller.
结果表明，在连接杆焊缝附近的热影响区中存在大量针状马氏体组织，在低应力的作用下，导致材料发生脆性断裂。
The result shows that the fracture mode is low stress brittle fracture. The fracture is mainly caused by needle type martensite in the heat affected zone of the weld joint.
同时玻璃表面存在大量微裂纹，当热应力达到临界值时，在热应力的作用下产生脆性断裂。
Since the surface of glass have many micro-crack, when the thermal stress reach the critical value, thermal breakage occur.
同时玻璃表面存在大量微裂纹，当热应力达到临界值时，在热应力的作用下产生脆性断裂。
Since the surface of glass have many micro-crack, when the thermal stress reach the critical value, thermal breakage occur.
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