材料期刊网

测量了碳在纯镍中扩散内耗峰的峰高与含碳量的关系,结果指出峰高与含碳量的平方成正比。还准确地测定了在含锰18.5％的锰钢中内耗峰的高度与含碳量的关系,所得的图线指出,对于这种钢在表示合碳量的横坐标上确有一段截距存在。 由此认为,间隙原子在面心立方晶体的纯金属中所引起的内耗峰是由于在基体点阵中两个相邻间隙位置上的碳原子所组成的一个原子对在应力作用下的转动而产生的。加入合金元素会改变碳原子的状态,有可能使碳原子形成对的机会大大减少,因而在高锰钢中的内耗峰基本上还是由于碳-锰原子对的转动所引起来的。

Relationship between carbon content and height of the internal friction peak of carbon diffusionin pure nickel have been measured. In addition to this, the relationship between height of theinternal friction peak and the carbon content in the manganese steel containing 18.5% manganesewas also accurately determined, the obtained curve shows that the intersection of axis indicating thesolubility of carbon for this steel really exist. So that, the internal friction peak induced by the interstitial atoms diffusion in the pure metalof face center cubic crystal was owing to the rotation of the atomic pair of two neighbouring atomsin the crystal lattice under the action of stress. The state of carbon atoms may be modified by ad-dition of alloying elements, it can considerably reduce the possibility of formation of carbon atompair, consequently the internal friction peak in the high manganese alloy steel is primarily due tothe rotation of carbon-manganese atom pair.