高温下带焊缝实验室试样的力学行为及其预测能力

MECHANICAL BEHAVIOR OF LABORATORY CROSS WELD SPECIMEN AND ITS PREDICTIVE CAPACITY

由于焊材或母材的性质均很难反映焊缝的整体强度，用带焊缝的试样进行试验提供了合理评价焊接接头工艺性能的可能性。但是实验室的带焊缝试样能否真实地反映焊接构件的力学行为，则仍是需要进一步研究的问题。根据实验室单轴试验和计算模拟，揭示了单轴带焊缝试样的局限性。用于高温强度评价基本上是合适的，但用于模拟实际焊接构件的力学行为则误差甚大，这取决于焊缝的受力状况。

As the performance of weld material or parent material per se could hardly reflect the integral strength of a weldment, the uniaxial cross weld specimen provides an alternate to qualify the welding procedures. However, a further investigation is still needed in order to interpret the test results of cross weld specimens for application in practical welded components.The information obtained from recent studies indicates that the cross weld specimen may be used for the high temperature strength assessment, but can hardly be used for simulation of the practical welded component, depending on the loading case of the component.