硼对金属间化合物Ni_3Fe氢气诱发环境氢脆的影响(英文)

In this paper the tensile properties of both ordered and disordered Ni-24Fe and Ni-24Fe-0.03%B(wt%)alloys in gaseous hydrogen was investigated.The result shows that the ductility of the disordered Ni_3Fe is significantly larger than that of ordered material in gaseous hydrogen.However,the ductility of ordered Ni3Fe doped with 0.03%B is nearly the same as that of disordered one indicating the obvious suppressing effect of boron on the H_2-induced embrittlement.Based on the segregation behavior of boron in Ni_3Al,it is proposed that the suppressing effect of boron in Ni_3Fe on the H_2-induced embrittlement is attributed to the segregation of boron on grain boundaries,thereby reducing the hydrogen diffusivity along the grain boundaries.     

Anti-seismic behavior of HRB400 reinforced steel bars

1 Introduction Steel bar is one of the most important constructional materials ensuring the safety of buildings, and sufficient anti-seismic strength is required when it is applied to buildings in the region where an earthquake might occur. HRB335 steel bars are being used in China while 400 MPa steel bars are wildly used in Europe [1]. To ensure the security of buildings, 400 MPa steel bars have been developed in China. Before these steel bars being wildly used, a full-scale survey of the…     

轿车轻量化技术发展趋势的研究

轿车轻量化技术的研究一直是汽车行业中的热门话题,也是困扰汽车工业发展的一道难题。如何制造出安全性高,又节能环保的轿车,是整个汽车行业乃至全社会都非常关注的问题。为此,可结合未来汽车轻量化技术,从桥车车身的生产材料、发动机缸体制造方法及运行材料入手,这是汽车行业早日实现高效节能减排的一条捷径。     

超细晶建筑装饰铝合金的摩擦磨损性能研究

采用X射线衍射仪、摩擦磨损试验机和扫描电镜等手段,测试分析了固溶态、T6态和ECAP时效态6063铝合金的物相组成、显微组织和摩擦磨损性能.结果表明,固溶态、T6态和ECAP时效态6063铝合金的主要物相都为α-Al相、β-Mg2Si相、β-Mg1.7Si相和β"-Mg5Si6相,但是ECAP时效态6063铝合金的β相...