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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >LIQUID METAL EMBRITTLEMENT OF ZR-2.5-PERCENT NB ALLOY
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LIQUID METAL EMBRITTLEMENT OF ZR-2.5-PERCENT NB ALLOY

机译：ZR-2.5％NB合金的液态金属压印

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Liquid metal embrittlement (LME) of zirconium alloys in mercury is entirely transgranular. Grains not oriented for pseudo-cleavage on the basal plane fail by slip on the prism planes to form the characteristic 'fluting'. Because of this, fracture in Hg of Zr-2.5 Nb small compact tension specimens (cut from five different CANDU pressure tubes) showed large differences in the macroscopic fracture topography that could be related to differences in the local continuity of the basal planes in the structure, even though the average textures were very similar. These differences could be related to differences in the fracture toughness of the tubes. Although LME in zirconium alloys has been thought to be generally transgranular because of previous experience in Hg, Cs/Cd mixtures, a Hg/In/Tl eutectic, and Li, tests in Ga showed no transgranular cracking, but small amounts of intergranular cracking were observed that appeared to be limited by poor wetting of Zr by Ga. [References: 25]
机译：汞中锆合金的液态金属脆化（LME）完全是跨晶的。未在基面上进行假劈裂的晶粒由于在棱镜面上打滑而失效，从而形成了特征“凹槽”。因此，Zr-2.5 Nb小型紧凑拉伸试样（从五个不同的CANDU压力管中切出）的Hg断裂在宏观断裂形貌上显示出很大差异，这可能与结构中基面的局部连续性差异有关，即使平均纹理非常相似。这些差异可能与管子的断裂韧性的差异有关。尽管由于先前在Hg，Cs / Cd混合物，Hg / In / Tl共晶和Li中的经验，锆合金中的LME通常被认为是跨晶的，但在Ga中的测试表明没有晶界的开裂，但是少量的晶间开裂是观察到似乎受Ga对Zr润湿性差的限制。[参考文献：25]

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