Precipitation and Mechanical Property of V‐Alloyed Steel: Role of Cooling Rate

2019 ◽  
Vol 91 (2) ◽  
pp. 1900444
Author(s):  
Zhang Huang ◽  
Hao Yu ◽  
Chenghao Song ◽  
Shuying Li ◽  
Xiaoni Duan ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Cooling Rate ◽  
Alloyed Steel

Effects of Cooling Rate on Microstructure and Properties of Nb-Ti Micro-Alloyed Steel

2013 ◽  
Vol 341-342 ◽  
pp. 208-212
Author(s):  
Xin Li ◽  
Jie Zhao ◽  
Xun Yang ◽  
Jun Cheng Bao ◽  
Bao Qun Ning
Keyword(s):  
Mechanical Property ◽  
Cooling Rate ◽  
Grain Refinement ◽  
Hot Rolling ◽  
High Strength Steel ◽  
High Strength ◽  
Alloyed Steel ◽  
Continuous Cooling Transformation ◽  
Micro Alloyed Steel ◽  
P Colonies

Continuous cooling transformation (CCT) curves of deformed austenite (A) of Nb-Ti microalloying high strength steel were measured using Gleeble-3800 thermo-mechanical simulator, and corresponding transformation and structure were analyzed, and the effects of cooling rate on the tested steels mechanical property were studied. The resultes showed that the Ar3transformation point decreased with increasing cooling rate after hot-rolling. The morphology of ferrite (F) grains changed from polygonal to lath, and the pearlite (P) colonies became more fine with increasing cooling rate. The quantity of ferrite and pearlite decreased, and the quantity of bainite (B) and martensite (M) increased. Then the hardness of Nb-Ti micro-alloyed steel is increased along with the increasing cooling rate, which may owing to the reasons that the hardness of ferrite and pearlite is far smaller than that of bainite and martensite, and the grain refinement causes the hardness increasing.

The role of cooling rate on microstructure in a sand-cast Al-Cu–Ag alloy containing high amounts of TiB2

2021 ◽  
pp. 1-9
Author(s):  
Lucas Ravkov ◽  
Bradley Diak ◽  
Mark Gallerneault ◽  
Peter Clark ◽  
Giuseppe Marzano
Keyword(s):  
Cooling Rate ◽  
Sand Cast

scholarly journals Solidifying behavior and Characterization of Al (LM6) +SICP Metal Matrix Composites

2019 ◽  
Vol 8 (6) ◽  
pp. 2397-2403 ◽  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Cooling Rate ◽  
Metal Matrix Composite ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Liquid Temperature ◽  
Step Size ◽  
Different Parts

This paper presents the investigation of moderate properties of solidified Al (LM6)+SiCp metal matrix composite (AMMC). These AMMC is fabricated by considering five different parts of casting and different weight of SiCp for reinforcement. The SiCp wt. % is varied from 5 wt. % to 15 wt. % with a step size 5 %. During casting, temperature is measured using K-thermocouple and temperature vs. solidification curve is traced. These results are compared with the solidification results of Al (LM6) alloy. It is observed that the solidifying duration of AMMC increased as well as decreased liquid temperature by adding SiCp to it. The trend of the curve is also presented that the cooling rate and the duration of solidification are different for different part of casting. Mechanical property of the each five parts of casting is tabulated. It is observed from the properties that the mechanical properties of AMMC increased by increasing the wt. % of the reinforced particles SiCp.

scholarly journals On the role of cooling rate and temperature in forming twinned α’ martensite in Ti–6Al–4V

2020 ◽  
Vol 813 ◽  
pp. 152247 ◽  
Author(s):  
Sheng Cao ◽  
Bohua Zhang ◽  
Yi Yang ◽  
Qingbo Jia ◽  
Lei Li ◽  
...  
Keyword(s):  
Cooling Rate

Grain Refinement Performance of Al Cast Using Machining Chips

2010 ◽  
Vol 654-656 ◽  
pp. 1444-1447 ◽  
Author(s):  
Yoshimi Watanabe ◽  
Kenichi Tabushi ◽  
Hisashi Sato ◽  
Eri Miura-Fujiwara
Keyword(s):  
Cooling Rate ◽  
Grain Refinement ◽  
Nucleation Site ◽  
Grain Refiner ◽  
Metallic Mold ◽  
Refinement Effect

In this study, grain refinement performance of as-cast Al using machining chip of Al instead of the grain refiner is investigated. At first, the machining chips of pure Al are placed in metallic mold. Then, pure Al melt is inserted into the mold with the machining chips. From the microstructure of the as-cast Al using the machining chips, it is found that this machining chip in mold can induce grain refinement of as-cast Al. The increment of the Al chips enhances the grain refinement of the as-cast Al. Moreover, it is shown that preheating the mold can reduce the pore inside as-cast Al using the machining chips. This grain-refinement effect by the machining chips would come from the enhancement of cooling rate and the role of the nucleation site. Therefore, it is concluded that the machining chips of Al can enhance the grain refinement of as-cast Al.

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