氘等离子体预辐照对W-Y2O3合金耐热冲击性能的影响

Effects of deuterium plasma pre-irradiation on the thermal shock resistance of HERF W-Y2O3 alloy

应用直线等离子体装置,对W-Y2O3合金的垂直于锻造轴(锻造面)和平行于锻造轴(横截面)的两个表面进行了氘等离子体辐照。利用60kW电子束材料测试平台,研究了等离子体辐照前、后的W-Y2O3合金在功率0.22~0.44GW·m^-2下耐瞬态热冲击性能。结果表明,氘等离子体辐照没有降低钨合金的裂纹阈值,其中锻造面的裂纹阈值范围高于横截面,且超过了0.33GW·m^-2。综合考虑高能率锻造W-Y2O3合金的氘离子辐照与热冲击行为,锻造面可能更适合面对等离子体。

The transient thermal shock resistance experiments of W-Y2O3 alloy before and after deuterium plasma irradiation were carried out on the 60kW Electronic-beam Materials testing Scenario (EMS-60) under the absorbed power density from 0.22GW·m^-2 to 0.44GW·m^-2. The consequences indicated that, low energy deuterium irradiation did not reduce the cracking thresholds of the W-Y2O3 alloy for both the forging plane (perpendicular to the forging axis) and its cross section plane (parallel to the forging axis), while the forging plane showed higher cracking threshold, surpassing 0.33GW·m^-2. By comprehensive consideration, the transient thermal shock resistance and deuterium plasma irradiation behaviors of the high energy rate forging W-Y2O3, the forging plane may be more suitable for facing plasma.