并利用显微组织变化和电化学理论分析了焊缝试样HAZ的SCC机理。
The mechanism of SCC in HAZ of specimens was analyzed by the microstructure variation and electrochemical theory.
选用水面舰艇用945钢和潜艇用921a钢，研究了不同焊缝外形尺寸对爆炸试验中三缺口试样的中央缺口开裂行为的影响。
Using 945 steel and 921a steel, this article studies the effect of weld profile and size on the cracking behavior of a central notch in a three-notch specimen for an explosion bulge test.
在显微硬度测试中，在焊缝试样横截面上用锥形金刚石压入23或更多的点。
In the microhardness survey test, a pyramid-shaped diamond is impressed into 23 or more points across the face of a weld sample cross section.
通过改变焊缝夏比冲击试样的缺口取向，研究了缺口位向对多层焊缝金属韧性及断裂过程的影响。
By changing the nolch local ion of Charpy impact test specimens studied the effect of nolch location on toughness and cracking process in multi-layer welds.
结果表明，经过焊后热处理后焊缝出现严重的低温脆化，其冲击试样的断口为解理状形貌；
The results show that after post-weld heat treatment(PWHT), the welds of X80 steel seriously embrittle, and the fracture morphology of impact specimens is cleavage.
疲劳试验发现，疲劳试样断裂位置多发生在焊缝处，并对疲劳断口进行了SEM分析。
Fatigue beaked on weld seam more than other places. Fatigue crack initiation occurred inside materials and fatigue fracture was analyzed by SEM.
冲击试样取样位置对焊缝冲击性能有明显的影响，板厚1/2位置的低温冲击功均低于1/4位置。
The effects of sampling position on low temperature impact property of the welds are obvious, and the impact energy of 1/2 plate thickness is lower than that of 1/4 plate.
焊缝区和热影响区试样的辉纹间距较基体区的大，说明裂纹扩展速率快，焊缝和热影响区的抗裂纹扩展性较基体差。
The striation spacing in heat affect zone and welded seam samples was wider than that in matrix sample, this shows that fatigue crack propagation...
结果表明：在焊缝区域内存在着局部未熔区以及铸造疏松组织和二次裂纹等缺陷，这是导致试样低应力断裂的根本原因。
The results show that the partial unmelted region, casting defect structure and secondary crack form in the welding seam, which result in the low stress breakage of the samples.
带焊缝A3钢试样的脆断敏感程度显著高于其母材；
The susceptibility to HIC of welded A3 steel is remarkably higher than that of matrix.
首先设计了相应的拉伸试样，进而对试验结果进行了对比分析，得到补焊焊缝的极限承载应力，为补焊管道的安全评价提供了依据。
The relevant tensile test specimens were designed and tested; then the test results were compared and analyzed to obtain the ultimate bearing stress. The study provides the basis for...
首先设计了相应的拉伸试样，进而对试验结果进行了对比分析，得到补焊焊缝的极限承载应力，为补焊管道的安全评价提供了依据。
The relevant tensile test specimens were designed and tested; then the test results were compared and analyzed to obtain the ultimate bearing stress. The study provides the basis for...
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