采用闭端内压爆破试验方法对?12×0.54 mm C103铌合金薄壁管材(以下简称C103)的承压能力进行了评估,并对爆破后管材的微观组织进行了研究,通过闭端内压爆破检测系统获得了C103薄壁管材的爆破周向极限强度和周向延伸率,分别达到了472...采用闭端内压爆破试验方法对?12×0.54 mm C103铌合金薄壁管材(以下简称C103)的承压能力进行了评估,并对爆破后管材的微观组织进行了研究,通过闭端内压爆破检测系统获得了C103薄壁管材的爆破周向极限强度和周向延伸率,分别达到了472 MPa^477 MPa和19.41%~19.43%,这说明其具有较好的塑性和承压能力。展开更多
In this paper,transient electromagnetic method was used to carry out the feasibility study on the detection and recognition of chamber blasting misfire.Firstly,an electromagnetic background field was established in th...In this paper,transient electromagnetic method was used to carry out the feasibility study on the detection and recognition of chamber blasting misfire.Firstly,an electromagnetic background field was established in the test;secondly,a benign conductor was preset in the chamber,and then the background field was eliminated after the electromagnetic field was measured;thirdly,the transient electromagnetic field was measured again after blasting;at last,the chamber blasting misfire was detected and recognized by comparing the change of eddy current field of the preset benign conductor before and after blasting.The test results showed that:When the buried depth of aluminum box target was no more than 30 m,transient electromagnetic method can clearly identify the position of the aluminum box;when the buried depth of aluminum box was more than30 m,the buried depth and position of the aluminum box was not sure due to the unknown level of secondary eddy current field generated by aluminum box.展开更多
文摘采用闭端内压爆破试验方法对?12×0.54 mm C103铌合金薄壁管材(以下简称C103)的承压能力进行了评估,并对爆破后管材的微观组织进行了研究,通过闭端内压爆破检测系统获得了C103薄壁管材的爆破周向极限强度和周向延伸率,分别达到了472 MPa^477 MPa和19.41%~19.43%,这说明其具有较好的塑性和承压能力。
文摘In this paper,transient electromagnetic method was used to carry out the feasibility study on the detection and recognition of chamber blasting misfire.Firstly,an electromagnetic background field was established in the test;secondly,a benign conductor was preset in the chamber,and then the background field was eliminated after the electromagnetic field was measured;thirdly,the transient electromagnetic field was measured again after blasting;at last,the chamber blasting misfire was detected and recognized by comparing the change of eddy current field of the preset benign conductor before and after blasting.The test results showed that:When the buried depth of aluminum box target was no more than 30 m,transient electromagnetic method can clearly identify the position of the aluminum box;when the buried depth of aluminum box was more than30 m,the buried depth and position of the aluminum box was not sure due to the unknown level of secondary eddy current field generated by aluminum box.
