轴承钢GCr15的恒温相变超塑性

研究了ＧＣｒ１５钢在Ａｃ１相变点附近的恒温超塑性特性与变形温度的关系。结果表明，与一些材料一样，该钢也存在恒温相变超塑性现象。当初始应变速率为２．５×１０＾－４ｓ＾－１时，经预调质处理的ＧＣｒ１５钢试样，在７４８℃进行超塑性拉伸试验获得最大延伸率达８００％，流动应力为２４ＭＰａ。与已有的同类研究结果相比，其延伸率提高了２００％以上。     

Ni-P合金化学镀非晶态合金的耐蚀性研究

研究了化学镀非晶态Ni-P合金的耐蚀性及耐蚀机理,证明了非晶态Ni-P合金化学镀镀层具有良好的耐蚀性能。     

国内非晶态合金镀层研究动态

以９０年代国内公开发表的非晶态合金镀层的研究论文基础,综述该领域近期发展动态,指出非晶态合金以镍基合金度层为主,铁基合金镀层近期研究增多,其它合金镀层的研究逐渐增加,是国内研究的现状,但与日本相比,镀层种类仍较为单调,其工艺方法相对单一,尤其是化学镀更显滞后。     

非晶态Fe-Cr合金镀层的制备

研究了Fe-Cr非晶态合金制备方法,得到了镀层成分与结构的关系,测定了镀层耐蚀性。     

铁基非晶态合金电镀工艺

铁基非晶态合金镀层是非晶态合金镀层的一种，具有成本低，性能好的特点，现在是电镀工艺研究中一个热点，本文全面地论述了铁基非晶态合金的电镀工艺，包括非晶态结构的获得，工艺条件的影响，以及为实现工业应用尚需解决的问题。     

T8钢的恒温相变超塑性

T8钢经两次调质处理,在2.5×10~(-4)s~(-1)的初始应变速率条件下拉伸,在其Ac_1处显现恒温相变超塑性特性,获最大延伸率为451%,流动应力为38.5MPa。     

FeZr基非晶态合金的热稳定性

系统研究了Ｆｅ１００－ｘＺｒｘ和Ｆｅ９０－ｘＭｘＺｒ１０非晶态合金的晶化温度Ｔｃｒ与成分ｘ的关系。主要结果有：用Ｚｒ替代Ｆｅ使晶化温度明显提高；在Ｆｅ－Ｍ－Ｚｒ非晶态合金系中，随ｘ增加，当Ｍ取Ｍｎ，Ｃｒ，Ｖ时Ｔｃｒ增高，当Ｍ取Ｃｏ、Ｎｉ时Ｔｃｒ下降，化温度与熔点Ｔｍ的比值约２／３。随着每个原子平均外层电子浓度ｅ／ａ的减少Ｔｃｒ值线性地增高，上述结果用相关的因素进行了讨论。     

块体非晶态合金的应用和发展趋势

基本特性应用领域高强度机械结构材料高硬度精密光学材料高断裂韧性模具材料高疲劳强度切割材料高弹性能电极材料高耐蚀性耐蚀材料高耐磨性贮氢材料高滞流性装饰材料高反射比复合材料良好的软磁性记录仪表材料高频磁导率体育用品材料高磁致伸缩连接材料高效电极 (氯气 )软磁材料高贮氢容量高磁致伸缩材料　　左表列出了块体非晶态合金当前和未来的应用。块体非晶态合金具有传统晶态合金难以得到的优异的性能 ,另外 ,还有由于由熔融液体直接形成的很大优越性 ,在过冷液相区容易制成不同的形状。因其许多优异的特性 ,现已用来制作模具材料 (Ｐ…     

ISOTHERMAL PHASE TRANSFORMATION IN Au-Si AMORPHOUS ALLOY

Electric resistivity measurements and X-ray diffraction analysis were performed to study theisothermal phase transformation in amorphous Au-Si ribbons with eutectic composition pre-pared using melt-spinning technique.A series of phase transformations take placespontaneously at room temperature and accelerate at elevated temperatures.Four stages ofthe transformation from amorphous state to the equilibrium state can be distinguished.Dis-cussion on the structural character of the metastable phases indicates that Hume-Rotheryelectron compounds and size factor compounds could form during isothermal aging.     

非晶态合金向纳米晶体的相转变

利用非晶态合金的晶化过程可以形成纳米尺寸晶粒的多晶体材料（即纳米晶体），这种制备纳米晶体的方法近年来得到了广泛重视和深入研究，本文对这种制备方法和非晶态合金向纳米晶体的相转变动力学、热力学及转变机理等方面进行综述．     

Ni—Ti合金中双程形状记忆速动相变的研究

利用应力对双程形状记忆合金中相变驱动力的制约作用,在Ni-Ti合金中实现了不需附加机构的速动相变和速动双程形状记忆效应。     

SNAP-ACTION PHASE TRANSFORMATION IN TWO-WAY SHAPE MEMORY Ni-Ti ALLOY

The snap-action behavior of a Ni-Ti alloy disc which is controlled by combination of anonlinear stress field and temperature has been studied.After treatment for two-way shapememory,all shape memory strain of snap-action finishes abruptly at a certain temperaturewithin an interval of less than 1 ms.The results of resistance measurement and in-situ X-raydiffraction indicate that the snap-action strain is mainly resulted from the snap-action β R transformation.     

GROWTH OF ISOTHERMAL MARTENSITE IN AN Fe-Ni-Mn ALLOY

The substructural development of martensite plates at different stage of the transformation foran Fe-21Ni-4Mn alloy has been investigated by using transmission electron microscope.Twinning was found in small thin platelets at the initial stage.Fine twins extend to the wholeplatelet.The dislocations and twins were found in the thick platelets at a later stage.Bendingof the twins was also observed frequently at this stage.Finally,several platelets coalesce witheach other to form a macroscopic(252)_f martensite“plate”.The original habit plane of theindividual platelet was measured to be close to(121)_f.     

Fe-Ni-Mn合金中等温马氏体的生长过程

本文采用透射电子显微镜研究了Fe-21Ni-4Mn合金中等温马氏体的生长过程,着重探讨了生长过程中亚结构的发展和变化.结果表明,在马氏体生长的初期阶段,小的薄片状马氏体的亚结构完全是以(112)_b为孪晶面的孪晶,并且贯穿整个片内,相界面平直向前生长.稍后阶段,片的生长主要集中在一侧,此例相界面弯曲向前生长,出现非孪晶区域,内含大量位错,同时,片的孪晶弯曲.生长到后期,弯曲的相界面变为平直,邻近相同位向的小片相互联接在一起,形成一宏观惯习面为(252)_f的大马氏体片,而构成大片的小马氏体片的惯习面为(121)_f.     

Zr52.5Ni14.6Al10Cu17.9Ti5块体玻璃合金等温晶化与结构转变

对采用射流成形方法制备了Ｚｒ５２．５Ｎｉ１４．６Ａｌ１０Ｃｕ１７．９Ｔｉ５块体玻璃合金进行等温退火,利用Ｘ射线衍射和ＳＥＭ及ＴＥＭ分析了块状玻璃态合金等温晶化时相转变及组织转变。     

PHASE TRANSFORMATION IN RAPIDLY SOLIDIFIED AI-Cu-Fe ALLOY

By means of rapid solidification, two Al_(65)Cu_(20)Fe_(15) powders were prepared with water and liquid N_2 as the respective cooling agent. Both powders are composed of a qnasicrystalline icosahedral phase and a crystalline hexagonal phase, with the water-cooled alloy having a higher crystalline phase content. In the isothermal an nealing process, the crystalline phase in the water-quenched alloy begins to decrease at 500℃ and then disap pears at 600～700℃. At about 800℃, new crystalline phases form, and at 900℃, the quasicrystalline phase disappears. Conversely, in the liquid N_2 quenched alloy, the quasicrystalline phase starts to decrease at about 500℃. and the hexagonal phase decomposes into new crystalline phases. At 700～800℃, the quasicrystalline phase disappears. For the water-cooled sample, the quenching at 100～200C makes the crystalline to quasicrystalline phase transformation start at a lower temperature and the crystallization of the quasicrystal occur at a higher temperature. For the liquid N_2 quenched alloy, the quenching at 100～400℃, did not affect its phase transformation at high temperature.     

Zr-二十面体准晶-十次准晶伪三元系中非晶的形成

分析了块状非晶与稳定准晶结构上的异同点，选择两种稳定准晶(二十面体准晶和十次准晶)相互混合，在保持准晶二十面体基本结构单元的基础上，增加元素组成的混乱度，再添加有利于形成高配位多面体的元素Zr，用急冷方法制备出非晶合金．对此非晶合金的热力学测试表明，该非晶形成能力和稳定性与Inoue的Zr65Al7.5Cu17.5Ni10非晶相近．     

Zr对Cu—Zn—Al形状记忆合金相变的影响

采用示差扫描热分析(DSC)、X射线衍射及透射电镜,研究了Zr对Cu-Zn-Al合金高温相变、马氏体正逆转变以及形状记忆效应的影响。结果表明,添加Zr0.35wt-％时,能有效地抑制α,γ相析出,促进β_2→DO_3→18RM转变。(M_s-M_f)及(A_s-A_f)温度区间较窄,马氏体相变激活能最低,马氏体变体间界面的可动性好,形状记忆效应最佳。