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copper pollution
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    While employing constant load tensile tests,the mechanical properties of TC11 alloy are slightly influenced by contacted copper at 500 ℃,but the fracture life and ductility of the titanium alloy are decreased remarkably at 550 ℃ by copper pollution.
    在恒载荷试验条件下,500℃时,Cu对钛合金的力学性能影响较低; 550℃时,Cu使TC11合金的断裂寿命和塑性指标显著降低。
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  copper pollution
A particularly high pollution levelwas observed for mercury in the cleaning bay area.Also lead, zinc and copper pollution levels wererelatively high in the cleaning bay and side trackareas.
      
Digital Air Photo Processing for Mapping of Copper Roof Distribution and Estimation of Related Copper Pollution
      
Effects of copper pollution on the ultrastructure of Lessonia spp.
      
Decision-making processes in ecological risk assessment using copper pollution of Macquarie Harbour from Mt.
      
Our results indicatethat copper pollution significantly interrupts the action of shreddersprocessing leaf material in polluted streams.
      
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An investigation was made into the crack in the 1016×21mm bent pipe.An observation and analysis of the appearance and features of the crack by using metallographic microscope and scanning electron microanalyzer showed copper structure on the surface of the crack and its grain boundary.Further analysis indicated that external copper pollution was the major cause of the crack in the bent pipe.

对 10 16× 2 1mm弯管裂纹情况进行了调查研究 ,用金相显微镜和扫描电镜对裂纹形态及特征进行了观察和分析 ,发现裂纹表面及周围晶界有铜相存在。进一步分析 ,认为外来铜污染是引起弯管开裂的主要原因。

The behavior of solid copper-induced embrittlement(SCIE) of TC11 titanium alloy was investigated using slow strain rate tests(SSRT) and constant load tensile tests(DLTT) at different temperatures.TC11 specimens were contacted with copper by using ion beam enhanced deposition and mechanical pressure methods.The results show that the SCIE susceptibility of TC11 alloy is high at 500 ℃,but it is not noticeable at 300 ℃ or 400 ℃ when SSRT methods are used.While employing constant load tensile tests,the mechanical...

The behavior of solid copper-induced embrittlement(SCIE) of TC11 titanium alloy was investigated using slow strain rate tests(SSRT) and constant load tensile tests(DLTT) at different temperatures.TC11 specimens were contacted with copper by using ion beam enhanced deposition and mechanical pressure methods.The results show that the SCIE susceptibility of TC11 alloy is high at 500 ℃,but it is not noticeable at 300 ℃ or 400 ℃ when SSRT methods are used.While employing constant load tensile tests,the mechanical properties of TC11 alloy are slightly influenced by contacted copper at 500 ℃,but the fracture life and ductility of the titanium alloy are decreased remarkably at 550 ℃ by copper pollution.The prerequisites for SCIE occurrence of this titanium alloy are as follow: copper must be in intimately contact with titaninm alloy surface,suitable temperature and strain rate are need.

分别采用慢应变速率拉伸、恒载荷拉伸加载方法研究了TC11钛合金在不同温度下的Cu脆行为,Cu与钛合金试样表面的接触分别采用离子束增强沉积和机械压合法实现。研究结果表明:在500℃慢速率拉伸条件下,钛合金呈现出较高的铜脆敏感性,而在300℃,400℃时,Cu脆敏感性不明显。在恒载荷试验条件下,500℃时,Cu对钛合金的力学性能影响较低;550℃时,Cu使TC11合金的断裂寿命和塑性指标显著降低。Cu脆的发生必须满足:Cu与钛合金紧密接触;合适的温度;试样应保持一定大小的形变速率。

 
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