Unified Terminology for Strain Induced Boundaries

Hot deformation behavior and microstructural evolution of homogenized 7050 aluminum alloy during compression at elevated temperature

“…Therefore, in our study, recrystallization did not occur during compression at elevated temperature. It is in accordance with the prior confirming work [15][16][17].…”

“…Since the grains have elongated laterally under compression: a unit cube would change to 0.4 × 2.5 thus increasing the HAB length in a section by 50-70%; length per grain of 66.5 micros diameter = 1.7 × 1/2 ( × 66.5) ≈ 177.6 m (1/2, each boundary shared by 2 grains). In addition, considering the results of Barrett and Levenson [21] and of Kulkarni et al [22], each grain could develop one deformation band with transition boundaries (TB) [17] on each side (these are not subgrain boundaries) that would become HAB thus providing a doubling of the HAB lineal length on a section. The above changes would be the same for all deformation conditions: HAB = GB + TB ≈ 355.2 m. The size of the subgrains obtained from the OIM was shown in Table 2.…”

“…Thus dynamic [15] and Straub and Blum [20], it pointed out that an increase/decrease in the fraction of HAB/LAB cannot be interpreted as evidence of continuous dynamic recrystallization being the mechanism for the steady state deformation. The original grain boundaries (GB) and transition boundaries (TB) [17,21,22] between deformation bands should be taken into account. To give a reasonable explanation for the differences in the fractions of LAB/HAB in Fig.…”

Transmission Electron Microscopy Study of Strain-Induced Low- and High-Angle Boundary Development in Equal-Channel Angular-Pressed Commercially Pure Aluminum

“…[10] The discussion on the boundary nomenclature is still going on. [11] In the present work, we distinguish the boundaries according to their misorientation /. In particular, low-angle boundaries with / < 15 deg are generally planar dislocation networks separating parts of the same grain.…”

Thermal and Mechanical Treatments of Al, Al Alloys, and Other Lightweight Metals and Alloys

“…For Al, improved processing schedules were found for Al-Mg-Si alloys in press quenching after hot extrusion and in solution treating before cold impact extrusion [5][6][7][8][9][10]. The wide variety of TMP for Al is found in a recent book [11] that relates it to all classes of alloys and to rolling [12][13][14][15][16], extrusion [8,9,16], and forging [17]. TMP has spread to many metals as noted in the adjoining papers developed to level that modeling is possible [18].…”