The electromagnet coil former was analyzed by means of metallurgical microscope. The results shows that cracks results from excessive hightemperature while casting and material embrittlement.
用金相显微镜对衔铁线圈骨架的裂纹进行分析。结果表明，由于锻造加热温度偏高， 材料脆化导致裂纹形成。
2
Through the comprehensive analysis, the result shows that crack failure reason is embrittlement of the austenite stainless steel at hightemperature.
通过综合分析指出对流管发生失效的原因是奥氏体不锈钢长期在高温下工作引起的热脆化开裂。
3
Nonequilibrium statistical method is used to study the helium embrittlement of metals under neutron irradiation and hightemperature.