| 再结晶钼合金的晶界偏析及其对脆性晶间断裂的影响 |
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| 引用本文： | 金和玉. 再结晶钼合金的晶界偏析及其对脆性晶间断裂的影响[J]. 中国钼业, 1995, 19(4): 27-30 |
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| 作者姓名： | 金和玉 |
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| 摘 要： | 业已确定，再结晶钼合金的碳和氧偏析与温度的关系并不是单调的，这是一系列组织结构变化的结果，位错亚组织破碎，晶粒长大和晶界迁移，晶粒边界粒子的析出和溶解，近边界区内杂质元素之间的化学相互作用。建立了晶界化学和冷脆性温度之间的关系，造成晶间脆性的因素是一定温度下的氧偏析增加，杂质原子导致的近边界区强化，沿着晶界的扁平碳化物形成。
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| 关 键 词： | 钼合金 再结晶 脆性 断裂 晶粒边界 |
GRAIN BOUNDARY SEGREGATION IN RECRYSTALLIZED MOLYBDENUM ALLOYS AND ITS EFFECT ON BRITTLE INTERGRANULAR RUPTURE |
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| Jin Heyu. GRAIN BOUNDARY SEGREGATION IN RECRYSTALLIZED MOLYBDENUM ALLOYS AND ITS EFFECT ON BRITTLE INTERGRANULAR RUPTURE[J]. China Molybdenum Industry, 1995, 19(4): 27-30 |
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| Authors: | Jin Heyu |
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| Abstract: | It was established that the temperature dependence of carbon and oxygen segregation is nonmonotonous in recrystallized molybdenum alloys. Such a dependence is the Tesult of a number of structural changes: dislocation substructure disintegration; grain growth and grain boundary migration; precipitation and dissolution of grain boundary particles;chemical interaction between grain boundary chemistry and cold brittleness temperature. The following factors promote the intergranular brittleness growth;the oxygen segregation increase at certain temperaturei the near-boundary zone strengthening by impurity atomsI flat carbides formation along the boundaries. |
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| Keywords: | Molybdenum alloys Recrystallization Brittleness Rupture Grain foundaries |
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