[PDF] Top 20 The effect of direct thermal method, temperature and time on microstructure of a cast aluminum alloy

... The direct thermal method is used for the creation of globular microstructures suitable for semi-solid metal ...using direct thermal method are ...estimate temperature ... See full document

... grey cast iron by minimizing under cooling and increasing the nucleation site during ...to temperature below the metastable eutectic temperature where carbidic structures are formed or reduce it if ... See full document

... high hardness of 30HRC, however as the aging time is 1.5 hours, hardness is about 34HRC. This value is quite high and suitable for many applications such as abrasion and high elasticity mechanical parts. The aging ... See full document

... the effect of mold preheating temperature on the ratio of the volume fraction of “blocky” carbides to that of “eutectic” carbides, ...low temperature, the R(B/E) ratio is approximately close to ... See full document

... the temperature reaches its maximum value and remains constant during a dwell ...the temperature varies between two minimum and maximum ...minimum temperature (T min ) which is ... See full document

... the temperature experienced by the material was seen to be greatest at the interface between the tool shoulder and the workpiece, Furthermore, the process temperature was found to increase with increasing ... See full document

... solution time was maintained at 30 min which will not allow excess dissolving of residual phases in α-Al matrix so that the strength won’t be compromised because if the solution time is greater than 60 mins ... See full document

... liquidus temperature is poured into a steel crucible and then treated to form a globular microstructure before moving into a forming ...range temperature it will form globular microstructures [1, ... See full document

... The microstructure and properties of modified layers were studied by XRD, SEM, micro hardness tester and electrochemical worksta- tion, and compared with the untreated ...loading time is 15 s, between the ... See full document

... solutionizing temperature for a long holding ...high temperature for long holding time), excess silicon can precipitate within the eutectic aluminum ...eutectic aluminum phase, ... See full document

... T6 thermal treatment to attain peak ...the alloy [13] . Another important factor to be considered is the time of exposure at the room temperature before the start of precipitation treatment ... See full document

... In Aluminum alloys, heat treatment is one of the superior tools to improve mechanical ...the microstructure of the alloy and in turns improve the mechanical properties by creating some strengthening ... See full document

... The effect of squeeze casting process parameters on wear behavior of AC2A aluminium alloy was primarily investigated in this experimental ...pouring temperature, die temperature, die material ... See full document

... microstructure of NF6357A cast chromium steel containing 2.59% C- 0.7%Si-0.91%Mn- 18.54%Cr-0.019%P-0.01%S- balance–Fe after appropriate heat treatment such as quenching and tempering process have been ... See full document

... wrought alloy which has wide spread application in marine and aircraft ...this alloy will lead to many problems such as porosity, hot cracking, and micro-fissuring ... See full document

... master alloy ingots were fabricated by arc melting a mixture of pure Zr, Cu, and Al in an Ar ...master alloy ingots were remelted several times in order to ensure chemical ... See full document

... RESULTS AND DISCUSSIONS Figure 3 below plots the transit time and the furnace temperature versus the testing time during the whole heating, annealing and cooling process.. During heating[r] ... See full document

... the aluminum alloys when exposed to a more severe alkaline medium which turns out to be the pitting form of ...The effect of the chemical attack on the different specimens’ can be clearly seen in Table ... See full document

... cast alloy. The main objective of the research is to investigate the effect of ...on microstructure and hardness value of ADC12 cast ...base alloy. With La addition the Si size ... See full document

... room temperature on samples of different section of as cast MMCs reinforced with 5 wt% & 10 wt% ...in cast composites the percentage of deformation decreases that means the forgeability of ... See full document