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界析出相的相间距增加,晶界无沉淀析出带(Precipitate free zone, PFZ)宽度也相应增大,晶界处的这些析出相是η平衡相.当淬火速率为960 ℃/s时,合金中晶界上的第二相尺寸比较均匀,分布较连续,呈链条状.当淬火速率为98 ℃/s时,晶界上的第二相尺寸有所增加,分布不连续,晶界PFZ宽度有所增加.当淬火速率为10.8 ℃/s时,晶界上的第二相尺寸明显增加,其周围有明显的无沉淀析... at different quenching rates 图6 淬火速率对晶界析出相尺寸的影响 Fig. 6 Effect of quenching rates on size of precipitate in grain boundary 图7 淬火速率对晶界PFZ宽度的影响 Fig. 7 Effect of quenching rates on width......
罩式退火炉退火温度对Q235冷轧板组织与性能的影响何方1,刘清友2,孙新军2,项金钟0(1.云南省昆明市云南大学物理科学与技术学院2.钢铁研究总院 结构所,北京 100081)摘 要:主要通过实验室模拟工业罩式退火工艺,研究不同退火温度对Q235冷轧板的组织与性能的影响.通过光学显微镜观察不同退火温度下铁素体的晶粒长大情况,结果显示:晶粒尺寸随退火温度升高而增加,当退火温度在600~640℃时,横向尺寸长大较缓慢.通过透射电镜观察析出物的形貌并进行物相分析,知析出物为渗碳体.统计析出物在不同退火温度下的尺寸和分......
, prolonging transfer time can increase the percentage of intergranular fracture, which is mainly caused by wide grain boundary precipitate free zone. The failure mode of the Zr-containing alloy... grain boundary precipitate free zone and coarse equilibrium η phases in the matrix. Key words: 7055 aluminum alloy; transfer time; mechanical properties; grain boundary precipitate free zone......
the once solidification precipitate type, morphology and the microdistribution of alloying elements, were investigated. And then the formation process and mechanism of different solidification... the type and morphology of the non-equilibrium eutectic phases in grain boundaries. Key words: Al-Zn-Mg-Cu alloy; microstructure; non-equilibrium eutectic phase; solidification precipitate Al-Zn-Mg-Cu系铝合金,又......
fraction of the precipitates increase with the increase of Cu content and the size decreases. The precipitates are solute clusters in the T4 alloy.Key words:Al-Mg-Si-Cu alloy; Cu content; precipitate......
-quantitative relationship between precipitates and the electrical resistivity was established. Key words: Al-Mg-Si alloy; metastable phases; electrical resistivity; aging; precipitate 1 Introduction 6000 series...°), is the main strengthening precipitate in Al-Mg-Si alloys [8-11]; the semi-coherent β′ phase, with hexagonal structure and lattice parameters: a=0.705 nm, c=1.215 nm [10], has less strengthening effect......
technique; single crystal growth; rare earth compound; precipitate 1 Introduction In the past few years, much attention has been paid to ternary R2PdSi3 intermetallic compounds (R=Rare earth) which show... matrix: (a) Blocky RSi particle; (b) Strip RSi precipitate Fig. 5 SEM images showing GdSi precipitates (bright striations) within Gd2PdSi3 single crystal matrix......
parameters; micro-structure; mechanical property; precipitate phase 钛材具有适用于海洋环境的特性,如耐蚀性,无磁性,较高的综合力学性能和机械加工特性等,是一种天然的海洋装备结构材料.从20世纪50年代末开始,钛材在船舶和海洋工程中应用.不仅领域逐步拓宽,而且用量也随之增大[1-5].又因为钛合金材料在海洋工程的应用推广,不仅需要优良的性能和......
alloy; weld; heat affected zone; mechanical properties; microstructure; precipitate 异质金属间的焊接,不论是在航空制造业,汽车制造业,还是在船舶制造业等,都有广泛的应用.在实际生产中,可以根据不同部位的承载和环境的情况,选择不同的材料以满足要求,这样不仅能减少制造成本,而且还能起到美观和减重的作用.因此,异质金属间的焊..., ZANDBERGEN H W. Crystal structure of the orthorhombic U2-Al4Mg4Si4 precipitate in the Al-Mg-Si alloy system and its relation to the β″ and β′ phases[J]. Materials Science and Engineering A, 2005, 390: 127-138......
alloy; asymmetric twin-roll casting; deformation bands; precipitate 1 Introduction Twin-roll casting is a near-net-shape process, by which the plate with thickness of less than 10 mm can be produced......
