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phases. The second phases don’t change obviously with increasing temperature and time because the η phase is dissolved almost completely after solution treatment at 470 ℃ for 60 min. The best solution... forming around second phase after 450 ℃, 30 min solution treatment 图10 合金经470 ℃,60 min固溶后原始晶粒内部弥散分布的Al3Zr粒子的TEM像 Fig.10 TEM image of Al3Zr dispersoids in interior of original grains......
, as shown in Fig.2(a). The first phase is a dark pearlite phase in which the lamellae of α-ferrite and Fe3C (cementite) lie side by side, and the second phase is bright α-ferrite. Fig.2(b) shows... Fabrication of cast carbon steel with ultrafine TiC particles Sang-Hoon LEE, Jin-Ju PARK, Sung-Mo HONG, Byoung-Sun HAN, Min-Ku LEE, Chang-Kyu RHEE Nuclear Materials Research Division, Korea......
distributions. In this model, it is assumed that particles pyrolyze first to yield a gaseous fuel mixture. The second zone is reaction zone where convection and vaporization rates of the particles...Micro-organic dust combustion considering particles thermal resistanceMohammadamin Soltaninejad1, Farzad Faraji Dizaji2, Hossein Beidaghy Dizaji3, Mehdi Bidabadi1(1. School of Mechanical Engineering......
. 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......
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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