Ganglion-Blocking Drugs in Antihypertensive Therapy

Tempering Process and Precipitation Behavior of 8%Cr–2%WTa Steel

“…fine particle, is nϭ24.9. The value of n for the average or coarse particle of M 23 C 6 is close to the value for the defect assisted growth model, nϭ5 30) or the Ostwald ripening, nϭ3. 31,32) On the other hand, the value of n for the fine particles is very small and this may indicate that fine particles are easy to dissolve and may be easy to re-precipitate and, as a consequence, the growth rate is very small.…”

“…nϭ3 to 5. [30][31][32] This may imply the continuous occurrence of the following processes: TaC foot , which precipitated on dislocations, dissolves into the matrix, because the dislocations are annihilated by tempering and, therefore, the precipitates lose the stable precipitation sites. The dissolved Ta atoms re-precipitate on the nearby dislocations.…”

Effect of prior microstructures on the behavior of cementite particles during subcritical annealing of medium carbon steels

“…5(k)), the occurrence of equiaxed subgrains is detected. It is well known that ferrite at carbon contents above 0.2 %C undergoes recovery and grain growth during tempering, without recrystallization [15,16]. Consequently, the growth of subgrains can be attributed to the annihilation of subgrain boundaries after recovery.…”

“…The spheroidization process of martensite is described as the following sequence: the formation of cementite particles at boundaries in the elongated form, the occurrence of uniformly distributed fine cementite particles, and the growth of large cementite particles at boundaries at the expense of the smaller intragranular particles [13,14]. For steels with carbon contents above 0.2 %C, the changes of a matrix during subcritical annealing are described as recovery with the polygonization and the annihilation of dislocations, and grain growth without recrystallization [15,16]. The behavior of the bainite structure during subcritical annealing is a little different from that of martensite.…”

Numerical Simulation of Copper Precipitation during Aging in Deformed Fe-Cu Alloys

“…It was reported that the coarsening of particles on dislocations follows a t 1/5 or t 1/6 law depending on whether the number of dislocation pipes in contact with the precipitate is constant or not. 46,47) However, this was derived under the assumption that the transport of solute is restricted to the vicinity of a dislocation and thus, the formation of solute-depleted zone is not taken into account. Hence, it is not unreasonable that the coarsening rate of particles on dislocation does not follow the t 1/5 -law in this simulation.…”