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. The addition of Mn increases the recrystallization fraction and area fraction of residual second phase in the sheet, and leads to the submicron Mn-dispersoids. It also increases the size and spacing of Al3Zr... structure; second phase Al-Zn-Mg系合金因其较高的比强度,良好的耐蚀性和加工性能,作为结构材料被广泛地应用于航空航天和轨道交通领域[1-2].但是随着工业的发展和损伤容限设计原则在实际生产中的应用,要求这些结构材料不仅有较高的强度,还要有良好的断裂韧性,因此提高断裂韧性是高强铝合金的重要研究方向之一.为了提高该系合金的综合性能,常用Zr等过渡族元素进行微合金化.Zr......
observations reveal that the crystallographic orientations of the accumulated Cr particles, as shown in Fig.6, are different. Fig.6 also shows that a lot of second phase particles distribute in the large... into larger ones when the Cr-rich liquid started to solidify. The second phase separation occurred too. The EDS results can also prove that the Cr particles shown in Fig.1 are from liquid phase separation......
Synthesis of W-Y2O3 alloys by freeze-drying and subsequent low temperature sintering:Microstructure refinement and second phase particles regulationWeiqiang Hu,Zhi Dong,Liming Yu,Zongqing Ma... particles(about 100-300 nm) with a W-Y-O phase diffusion layer on their surface distribute at W grain boundaries,lots of nano Y2 WO6 particles(<20 nm) exist in W matrix.Moreover,many Y6 WO12(<10 nm......
and Technology, Wuhan 430081, China; 2. Wuhan Branch of Baosteel Central Research Institute, Wuhan 430080, China) Abstract: The austenite grain size growth and the second phase solid solution.... The results show that with the increase of the heating temperature or the holding time, the austenite grain size increases, while the number of the second phase precipitate decreases and the size increases......
cracks initiated during operation induce the lubrication oil leak and serious safety hazard. Microstructural heterogeneity, including shrinkage/gaspores and secondary phase particles, is the most... conditions. This paper reviews the influences of shrinkage/gaspores and secondary phase particles, formed during casting process, on the fatigue life of Al-Si-Mg cast Al alloys. Key words: cast aluminum......
Ri-sheng, Luan Bai-feng, Chai Lin-jiang, ZHOU Yu, CHEN Jian-wei. Review of second phase particles on zirconium alloys (II): Zr-Sn-Nb-Fe alloys[J]. The Chinese Journal of Nonferrous Metals, 2012, 22(6...] TOFFOLON M C, BRACHET J C, JAGO G. Studies of second phase particles in different zirconium alloys using extractive carbon replica and an electrolytic anodic dissolution procedure[J]. Journal......
by the Al3Zr particles in the alloy, therefore, recrystallization process and grain growth after recrystallization process are restrained. Key words: 7050 aluminum alloy; recrystallization; nucleation mechanism; second phase 铝合金热轧的显微组织由热轧时及热轧间隔过程中的回复与再结晶所决定,并对热......
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Metastable phase of b-eucryptite and thermal expansion behavior of eucryptite particles reinforced aluminum matrix compositeWANG Li-dong1, CUI Ye1, YANG Cong-tao2, WANG Kang-peng1, FEI Wei-dong1, 3(1... Engineering, Qinghai University, Xi’ning 810016, China)Abstract:The aluminum matrix composites with 15%, 35%, 55% and 75% (volume fraction) of b-eucryptite (Euc) particles were prepared by spark plasma......
; the second phase 镁合金具有密度低,比强度和比刚度高,阻尼性能好,电磁屏蔽效果优异及易回收利用等优点,在电子,电器,交通,航空,航天等领域具有... particles as a strengthening phase in Mg-Zn-Y alloyes[J]. Journal of Alloys and Compounds, 2002, 342: 445-450. [13] Yi S, Park E S, Ok J B. (Icosahedral phase+α-Mg) two phase microstructure......