张恒
,
陈学群
,
常万顺
腐蚀学报（英文）
选择6种冶金因素各有特点的低碳钢,通过模拟"闭塞腐蚀电池"试验和室内挂片试验,结合金相组织、硫印、磷偏析和腐蚀形貌分析,研究磷偏析对孔蚀扩展的影响.结果表明,腐蚀形貌上呈现出凹凸状的平行腐蚀沟槽,这种平行腐蚀沟槽与磷偏析相关,而不是与沿轧制延伸的夹杂物(硫偏析)或平行的带状组织(碳偏析)相关.凹凸状的平行腐蚀沟槽形成原因是磷在溶液中离解为磷酸根离子,产生微溶的金属盐,在蚀坑的阳极活化区沉淀,从而抑制了阳极溶解.
关键词:
孔蚀
,
夹杂物
,
闭塞腐蚀电池
,
磷偏析
,
室内挂片
LI Zhi XI Jukui YANG Yunlin Luoyang Institute of Technology
,
Luoyang
,
China
金属学报(英文版)
The influence of high temperature repressing treatment on the segregation of phosphorus in the 93W alloy was carefully investigated by means of Auger electron spectroscope,EPMA, TEM and SEM.The segregation of phosphorus has been observed at the tungsten-tungsten grain boundaries,particularly at the tungsten-matrix interphases when the specimens were kept at the temperature in the range of 1200—1500℃ ,followed by furnace cooling.However, no segregation of phosphorus was observed at the interfaces after the specimens were re- pressed at the range of temperature,followed by furnace cooling.After investigation,the dis- locations in the matrix phase of as-repressed specimens directly influenced the phosphorus segregation to the interfaces.After annealing,the mechanical properties were reduced because of the phosphorus segregation at the interface boundaries.
关键词:
93W-4.5Ni-2.5Fe alloy
,
null
,
null
,
null
,
null
Qu Zhe XIE Tiansheng Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China
金属学报(英文版)
Phosphorus segregation and embrittlement of Ni-P amorphous annealed at the temperatures below crystallization have been investigated.The phosphorus enrichs on free surface and its level increases with annealing temperature.This is fairly coincident with the measured toughness which decreases with annealing temperature.AES ion-sputtering revealed that a phosphorus depletion zone in the subsurface layers forms due to element redistribution during annealing.The thickness and amplitude of the phosphorus depletion zone depend on the an- nealing temperature. The formation of depletion zone and the mechanism of embrittlement of Ni-P amorphous during annealing have been discussed based on the theory of the activation energy of atomic diffusion in the amorphous being variable.
关键词:
Ni-P amorphous
,
null
,
null
