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boundary precipitation
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  界沉淀
     Grain Boundary Precipitation in a 5Cr_(21)Mn_9Ni_4N Steel After Heating at High Temperature
     5Cr_(21)Mn_9Ni_4N钢高温加热后的晶界沉淀
短句来源
     Stratified Carbide Deposition and Grain Boundary Precipitation in Steel 5Cr21Mn9Ni4N
     5Cr21Mn9Ni4N钢中碳化物层状析出与晶界沉淀
短句来源
     and during isothermal aging at 650℃,thegrain boundary precipitation is characterized obviously.
     650℃等温时效过程出现较明显的晶界沉淀特征.
短句来源
     When intragranular precipitation and grain sizes are basically the same, the impact toughness decreased drastically with the increase of the size of grain boundary precipitation (including M23C6 phase, delta phase and M3B2 phase in the tested superalloy) and its distribution density in area and morphology becoming fragiler (such as filmy and dendritic).
     而晶内沉淀和晶粒尺寸等因素基本相同时,随晶界沉淀(包括所研究合金中的M23C6、δ相和M3B2相)尺寸和面分布密度的增大、形貌的脆性化(如薄膜状、枝晶状),冲击韧性大幅度下降。
短句来源
     The results indicate that misfit of solute atoms, lattice solubility and precipitation temperature all have effects on boundary precipitation.
     结果表明:溶质原子的错配度、点阵溶解度及沉淀温度对晶界沉淀产生影响。
短句来源
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  晶界沉淀
     Grain Boundary Precipitation in a 5Cr_(21)Mn_9Ni_4N Steel After Heating at High Temperature
     5Cr_(21)Mn_9Ni_4N钢高温加热后的晶界沉淀
短句来源
     Stratified Carbide Deposition and Grain Boundary Precipitation in Steel 5Cr21Mn9Ni4N
     5Cr21Mn9Ni4N钢中碳化物层状析出与晶界沉淀
短句来源
     and during isothermal aging at 650℃,thegrain boundary precipitation is characterized obviously.
     650℃等温时效过程出现较明显的晶界沉淀特征.
短句来源
     When intragranular precipitation and grain sizes are basically the same, the impact toughness decreased drastically with the increase of the size of grain boundary precipitation (including M23C6 phase, delta phase and M3B2 phase in the tested superalloy) and its distribution density in area and morphology becoming fragiler (such as filmy and dendritic).
     而晶内沉淀和晶粒尺寸等因素基本相同时,随晶界沉淀(包括所研究合金中的M23C6、δ相和M3B2相)尺寸和面分布密度的增大、形貌的脆性化(如薄膜状、枝晶状),冲击韧性大幅度下降。
短句来源
     The results indicate that misfit of solute atoms, lattice solubility and precipitation temperature all have effects on boundary precipitation.
     结果表明:溶质原子的错配度、点阵溶解度及沉淀温度对晶界沉淀产生影响。
短句来源
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  “boundary precipitation”译为未确定词的双语例句
     Effects of Quenching Agent on Grain Boundary Precipitation Behaviors of 7055 Aluminum Alloy
     淬火介质对7055铝合金晶界析出行为的影响
短句来源
     By using the metallographic observation, the effect of the aging temperature, cold deformation and alloying elements on the preferred grain boundary precipitation of Cu -Ni-Mn alloy during aging was investigated for the establishment of the method of restraining the preferred grain boundary precipitation of the alloy.
     本文利用金相观察法,研究了时效温度、冷变形和合金元素对Cu-20Ni-20Mn合金时效时晶界择优析出的影响,制定抑制该合金晶界择优析出的方法。
短句来源
     The grain boundary precipitation of M_(23)C_6 and quasi-pealile formed were studied using optical, scanning elecfron and transmission electron microscop.
     用光学、扫描和透射电镜观察研究了M_(23)C_6晶界“层状”析出和类珠光体的形成规律和组织特征。
短句来源
     The VC may coagulate and grow in a few nm larger and more M_(23)C_6 may precipitate along grain boundary after superimposed aging at elevated temperature. This microstructure and grain boundary precipitation may reduce the yield and stress rupture strengthes of the alloy, but improve the notch sensitivity of stress rupture test.
     通过补充时效后合金中VC颗粒聚集长大,晶界析出的M_(23)C_6更多,这种组织及晶界状态有利于改善合金的持久缺口敏感性。
短句来源
     Considering the effect of intergranular carbides density, a modifiedmodel has been proposed to try to suit any common case of the fraction of theintergranular carbides to the total grain boundary less than 1, on the basis of theprevious model for the grain boundary precipitation strengthening.
     本文在作者已建立的晶界析出强化模型的基础上进一步考虑了晶界碳化物密度的影响,把原模型发展为适用于碳化物的晶界覆盖率小于1的一般情况。
短句来源
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  boundary precipitation
The addition of C greatly reduces the coarse grain boundary precipitation of α.
      
Magnesium addition to Al-Cu led to S-phase (Al2CuMg) grain boundary precipitation and development of dislocation loops of the condensed vacancy type.
      
A mechanism of precipitate-free zone formation based on the modification of the as-quenched vacancy profile by the vacancies generated due to grain boundary precipitation was proposed to explain the observed results.
      
Grain boundary precipitation of Ti3Al was found to proceed rapidly in Ti-Al, Ti-Al-O, and Ti-Al-Sn alloys.
      
Kinetics of Ti3Al grain boundary precipitation in Ti-Al binary and Ti-Al-X ternary alloys and correlation with mechanical proper
      
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The effect of a trace of Cu, about 0.19 wt-%, on the precipitation, the critical nucleation temperature, T_c~′, as well as the microstructural parameters of a commercial purity Al-S.0Zn-1.75Mg alloy has been studied by means of hardness test, optical microscopy and TEM. It was resulted that Cu, in contrast to Cr, is an element by which its homogeneous precipitation is promoted, the T_c~′ is raised from 150—160℃ to 170—180℃ and the hardness is increased, but the grain size is not yet refined and the recrystallization...

The effect of a trace of Cu, about 0.19 wt-%, on the precipitation, the critical nucleation temperature, T_c~′, as well as the microstructural parameters of a commercial purity Al-S.0Zn-1.75Mg alloy has been studied by means of hardness test, optical microscopy and TEM. It was resulted that Cu, in contrast to Cr, is an element by which its homogeneous precipitation is promoted, the T_c~′ is raised from 150—160℃ to 170—180℃ and the hardness is increased, but the grain size is not yet refined and the recrystallization is not yet inhibited. Under the experimental condition of 120—200℃ aging, the grain boundary precipitation, the matrix precipitation and the precipitation-free zone of the Cu-contained alloy are minor to that of Cu-free one. All of these alteration may be monotoneous with elongation of aging time and elevation of aging temperature. Thus, it was proposed that the effect of Cu added on the precipitation and the structural parameters may he explained by a nucleation model which a complex cluster of the vacancy-tetrahedron combined with the segregated solute atoms, such as Zn, Mg and Cu, acts as a nucleus of GP zone.

本文利用硬度(HV)、光学显微镜和透射电镜(TEM)系统地研究了微量Cu(0.19%)对Al-5.0Zn-1.7Mg合金的沉淀过程、临界形核温度(T_c~′)和显微组织参数的影响。结果表明,Cu能促进合金均匀沉淀,提高T_c~′和HV,但没有细化晶粒和抑制再结晶的作用。但在本实验所采用的时效条件下(120—200℃),含Cu合金的晶界沉淀相(GBP)、基体沉淀相(MPt)和无沉淀带(PFZ)均比无Cu合金小,并且随时效时间的延长和温度的升高呈单调的变化。Cu的这种影响可用空位四面体与溶质原子结合成的复杂集团是GP区晶核的模型来说明。

The constitution and its effect on properties of elastic Nb-base alloy Nb-40Ti-5.5Al were examined by means of metallography,electron microscopy,X-ray dif-fraction analysis of chemically extracted phases and electron diffraction of thinfoil.The results showed that the heat treating temperature dependence of consti-tution of the alloy indicated as follows:annealing at≤400℃ for 1 h after cold-rolled with 70% reduction,no marked change is revealed;heat treating between550—700℃ for 1 h,an age-hardening peak is noted;annealing...

The constitution and its effect on properties of elastic Nb-base alloy Nb-40Ti-5.5Al were examined by means of metallography,electron microscopy,X-ray dif-fraction analysis of chemically extracted phases and electron diffraction of thinfoil.The results showed that the heat treating temperature dependence of consti-tution of the alloy indicated as follows:annealing at≤400℃ for 1 h after cold-rolled with 70% reduction,no marked change is revealed;heat treating between550—700℃ for 1 h,an age-hardening peak is noted;annealing at 1000℃ for 1h,the fully recrystallized solid solution is detected;further isothermal annealingat 650—750℃,the age-hardening and the precipitation of strengthening phase as(Nb,Ti)_3Al in the grains are obtained;and during isothermal aging at 650℃,thegrain boundary precipitation is characterized obviously.The internal stress in thealloy facilitates the phase precipitation.The post age-hardening tempering maycause the return phenomenon.

本文用金相、电镜、电解分离及X射线相分析、金属薄膜电子衍射等方法,研究了铌基弹性合金Nb-40Ti-5.5Al的组织结构,及其对性能的影响.试验结果如下:该合金铸态为单相固溶体.冷加工70%后,≤400℃保温1h热处理,组织结构及性能皆无明显变化.在550—700℃之间热处1h,出现明显的时效硬化峰.1000℃,1h处理后,为完全再结晶的固溶体组织.再经650—750℃等温处理亦产生时效硬化.晶内析出的强化相为(Nb,Ti)_3Al.650℃等温时效过程出现较明显的晶界沉淀特征.应力促进相析出.时效态合金可出现回归现象.

The TEM analysis of the microstructure of two GH36 superalloys undergone different regimes of heat treatment was conducted. The precipitates were identified as VC, M_(23)C_6 and NbC. The orientation relationship between the precipitates and γ matrix is shown as follows:[011]_(v C)//[011]_M//[011]_(M_(23)C_6)(111)_(v C)//(111)_M//(111)_(M_(23)C_6)(200)_(v C)//(200)_M//(200)_(M_(23)C_6)After normal heat treatment, the VC precipitates and distributes as fine dispersed particles of size from several to ten odd nm,...

The TEM analysis of the microstructure of two GH36 superalloys undergone different regimes of heat treatment was conducted. The precipitates were identified as VC, M_(23)C_6 and NbC. The orientation relationship between the precipitates and γ matrix is shown as follows:[011]_(v C)//[011]_M//[011]_(M_(23)C_6)(111)_(v C)//(111)_M//(111)_(M_(23)C_6)(200)_(v C)//(200)_M//(200)_(M_(23)C_6)After normal heat treatment, the VC precipitates and distributes as fine dispersed particles of size from several to ten odd nm, and minimum ones are down to 2.8 nm alone examined by Moire pattern. The VC may coagulate and grow in a few nm larger and more M_(23)C_6 may precipitate along grain boundary after superimposed aging at elevated temperature. This microstructure and grain boundary precipitation may reduce the yield and stress rupture strengthes of the alloy, but improve the notch sensitivity of stress rupture test.

使用薄膜TEM(透射电镜)直接观察了成分相近但热处理制度不同的两个炉号GH36合金的显微组织,使用SAD(选区电子衍射)和DF(暗场)技术做物相分析。结果表明,合金经正常热处理后析出细小弥散分布的VC,尺寸约为几nm至十几nm,由Moire干涉纹计算出最小的VC颗粒尺寸只有2.8nm。此外还有M_(23)C_6和NbC。其中VC和M_(23)C_6与合金基体的取向关系是[011]_(VC)//[11]_M//[011]_(M_(23)C_6),(111)_(VC)//(111)_M//(111)_(M_(23)C_6),(200)_(VC)//(200)_M//(200)_(M_(23)C_6)。通过补充时效后合金中VC颗粒聚集长大,晶界析出的M_(23)C_6更多,这种组织及晶界状态有利于改善合金的持久缺口敏感性。

 
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