交变漏磁检测中螺纹不同缺陷位置的识别方法研究

依据缺陷在螺纹区域的不同位置，将缺陷分为三类，分析了每类缺陷检测信号的特点，提出了识别判据，最后通过对膨胀螺钉上的该三类缺陷的检测，验证了识别模型的正确性。另外，对六角头螺栓结构根部缺陷的检测进行了试验研究，利用测量信号完成了缺陷的检测。     

脉冲电化学光整加工的流场及间隙特性

通过系统的试验研究，分析了工作液流场分布、流量、加工间隙等工艺参数对加工质量的影响。研究结果表明：合理控制加工间隙和工作液流场分布，对保证加工表面的质量极为重要；在优选的工艺参数下，可快速获得优质表面。     

电场作用下浸堆中氧气气体的渗流性质

针对电场作用对堆浸过程中氧气气体在浸堆中传输的影响，在实验室采用三轴渗流实验装置和电场实施装置，研究外加电场作用下浸堆中氧气气体的渗流性质。结果表明：电场作用对浸堆中氧气渗流性质的影响非常明显；电场作用下，氧气气体渗流速度比无电场时要大，并且渗流速度随氧气气体压力梯度增大成线性增加；加电场后，浸堆中氧气气体渗流量随电压（电场强度）升高成线性增大；渗透率越好的浸堆，氧气气体在浸堆中的电动效应越明显。     

双锭电磁铸造实验研究

通过对双锭电磁铸造模拟实验，研究了感应线圈内磁场分布，以及感应线圈以结方式、铸锭间距、电源频率和电流的变化时磁场分布的影响，为指导铸造工艺提供参考。     

Thermal spraying of biomaterials

Osteoconductive hydroxyapatite coatings for metallic endoprostheses for hip and knee joint replacement provide a state-of-the-art template for enhanced in-growth of bone cells. However, the high temperature of the plasma jet leads to large scale dehydroxylation and decomposition of the starting powder. A model is being developed to explain the formation of chemically and mechanically inhomogeneous porous calcium phosphate coatings deposited by atmospheric plasma spraying onto titanium alloy substrates. In addition the biofunctionality is being discussed of titania bond coats and their influence on the in vivo performance of hydroxyapatite-titania duplex coating systems.     

混流式水轮机转轮简化模型焊接应力场的数值模拟

在确定混流式水轮机转轮简化模型、解决分段焊焊接热源加载问题及解决各独立实体间接触边界节点不重合的热传导问题的基础上，对转轮模型焊接过程的应力场进行了数值模拟。得到了焊接过程中纵向应力的演变规律与焊后应力场的分布情况。结果表明，焊后应力的峰值出现在叶片与上冠或叶片与下环接触面的附近的叶片上。这个结果可以较好地解释水轮机转轮叶片疲劳裂纹的产生和扩展的失效行为。     

电场退火对08Al深冲钢板再结晶织构的影响

利用X射线衍射ODF分析方法，研究了电场对08Al深冲钢板单台阶退火和双台阶退火再结晶织构的影响。结果表明：电场提高了再结晶γ纤维织构的强度，同时降低了再结晶α纤维织构的强度。产生上述结果的主要原因是由于电场降低了各取向的形变储能，从而抑制了储存能小的取向晶核的形成及长大，促进了储存能大的再结晶γ取向晶粒的择优生长。     

光磁共振实验最佳扫场参数的确定和抽运信号图分析

用光磁共振实验测定铷原子的g因子和地磁场，并对实验得到的数据进行分析并确定测定g因子的最佳扫场幅度。从理论上对各种抽运信号图形的产生进行了分析。     

MnBi合金的结构与永磁性能

本文综述了有关MnBi低温相永磁材料方面的最新研究进展，对MnBi永磁合金的制备方法、结构及其永磁性能作了较为详尽的介绍。快淬和高能球磨方法可望成为单相性好的MnBi永磁合金的实用制备工艺。合金化方面的研究也显示出MnBi系合金的潜力。MnBi合金有望成为永磁性能较好且有好的温度特性(尤其是在高温时有很高的矫顽力并有正的矫顽力温度系数)的材料。MnBi合金可作为特殊用途的永磁材料，在许多领域获得应用。     

Amorphization and magnetic properties of Fe62Nb38 mechanically alloyed powders

The amorphization and magnetic properties of Fe62Nb38 mechanically alloyed powders were investigated. In the initial mechanical alloying processes, the lattice structure of pure Fe is destroyed due to the cold-welding and fracturing, accompanying the reduction of ferromagnetic properties. The Ms value of Fe62Nb38 powders with ball-milling time t=6 h is only 48.1 A.m^2/kg. With prolongating of mechanical alloying processes, a solid state amorphization reaction (SSAR) takes place and the Fe-Nb ferromagnetic amorphous phase is formed. With the milling time increasing from 6 to 18 h, the saturation magnetization of Fe62Nb38 powders increases with enhancement of the proportion of ferromagnetic amorphous phase in milled powders. The Ms value of the Fe62Nb38 amorphous powders is 98 A.m^2/kg, which is very close to the value estimated from dilute model. However, the Curie temperature of the Fe62Nb38 amorphous phase is only 206℃, which is much smaller than that of the pure Fe. This implies that the exchange interaction between Fe atoms in amorphous alloyed Fe62Nb38 becomes weak due to the Nb dilution. Investigation shows that the variation of magnetic properties of milled powders is one of important tools for describing the amorphization by mechanical alloying.