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Volume 31, Issue 5
Displaying 1-10 of 10 articles from this issue
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Toshimi YAMANE1981Volume 31Issue 5 Pages 299-300
Published: May 30, 1981
Released on J-STAGE: July 23, 2008
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Naoyuki KANETAKE, Yasuhisa TOZAWA, Takashi KATO, Fumio NONOYAMA1981Volume 31Issue 5 Pages 301-306
Published: May 30, 1981
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSTextures of commercial pure aluminum and Al-Mg alloy sheets were measured and represented by a threedimensional orientation distribution. The texture of aluminum included the cube texture of a recrystallization texture and (112) [111], (011) [211] and their intermediate S-orientation of rolling textures. Rolled sheets have both cube and rolling textures, but full hard sheets have little cube texture. Rolling textures remain in full annealed aluminum sheets. The texture hardly change by partial annealing or stabilizing. S-orientation, a typical component of the rolling texture in pure aluminum, approaches to (011) [211] in the full hard sheets. The main rolling texture of Al-Mg alloy sheets is (011) [211].View full abstractDownload PDF (755K) -
Naoyuki KANETAKE, Yasuhisa TOZAWA, Takashi KATO, Shigeo AIBA1981Volume 31Issue 5 Pages 307-312
Published: May 30, 1981
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSYield loci of commercial pure aluminum and Al-Mg alloy sheets were measured by the biaxial compression method using a rectangular specimen prepared by stacking and gluing sheets. The yield loci and r-values were crystallographically calculated by use of a three-dimensional crystallite orientation distribution function. Observed yield loci for aluminum are hexagonal in shape showing the TRESCA criterion. The loci are distored by rolling. The distortion in shape except one based on Bauschinger effect is also shown in calculated yield loci. Directional variation of stress for a certain strain state and r-values are in good agreement with calculated ones. The texture affects directional variations of strain and stress.View full abstractDownload PDF (713K) -
Shigeo ZAIMA, Yasuo SUZUKI, Susumu KAMO1981Volume 31Issue 5 Pages 313-318
Published: May 30, 1981
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSDrilling of large diameter holes on 5056-F which grows a vigorous built-up edge and on 2024-T4 which grows a small built-up edge was simulated by 10mmφ drilling at extrcmely slow revolution. The drilled surface was evaluated in the viewpoints of the built-up edge, chip flow angle and side flow of chip. The nose type built-up edge in drilling 5056-F greatly affects on the drilled surface in falling off and has large over cut in drill margin parts. The drilled surface of 5056-F is inferior in accuracy to that of 2024-T4 which grows a plate type built-up edge. The drilled surface is also inferior to that of 2024-T4 in chip flow angle, side flow and scratch. The growth of built-up edge is restrained, the chip flow angle is minimized and the side flow of chips hardly occurs in extremely slow wet drilling.View full abstractDownload PDF (1264K) -
Kozo ARAI, Ryotatsu OTSUKA, Shigemi TANIMOTO, Masashi SAKAGUCHI1981Volume 31Issue 5 Pages 319-324
Published: May 30, 1981
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSFour kinds of 7N01 billets containing different amounts of non-metallic inclusions only degassed, and degassed and filtered with rigid media filters 0.4, 0.7 and 1.5mm in pore diameter were extruded and T6 heat treated. The smaller the pore diameter of filter is, the more the non-metallic inclusions are removed, and the mechanical properties are improved. The elongation and toughness in a transverse direction (vertical to extruding direction) are remarkably raised in accordance with removal of oxide inclusions.View full abstractDownload PDF (1795K) -
Tetsuichi MOTEGI, Atsumi OHNO1981Volume 31Issue 5 Pages 325-333
Published: May 30, 1981
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSDilute Al-Ti alloys containing Ti up to 0.13% and Al-Ti-B alloys containing Ti and B up to 0.05% and up to 0.05% respectively were unidirectionally solidified. A columnar crystal consists of a cellular dendrite, and an equiaxed crystal consists of a free dendrite. No foreign particles such as TiC, TiB2 and TiAl3 are observed in the center of each crystal. If the unidirectionally solidified ingot entirely having columnar crystals is remelted and cast fine equiaxed crystals appear. Fine crystals nucleated on the top of the mold wall have a granular shape because of solute segregation of Ti and B. Granular crystals easily separate from the mold wall and form free dendrite crystals.View full abstractDownload PDF (2680K) -
Kozo ARAI, Takao SUZUKI1981Volume 31Issue 5 Pages 334-340
Published: May 30, 1981
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSRolling and annealing textures of 99.99% aluminum hot rolled at 480° to 590°C, cold rolled by 98.6% and annealed for 1h at 400°C were investigated. They depend on hot rolling temperature; the lower the hot rolling temperature the stronger is S-orientation in rolling texture, while the higher the hot rolling temperature, the stronger is cube orientation after annealing. A traceable amount of (100) nuclei still remain in aluminum hot rolled at elevated temperatures even after heavy reduction cold rolling and grow up to primary recrystallizing origins developing the cube texture.View full abstractDownload PDF (1607K) -
Shigeo ZAIMA, Yasuo SUZUKI, Hiroki OKUSHIMA, Shigeru YAMADA1981Volume 31Issue 5 Pages 341-346
Published: May 30, 1981
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSDry and wet cutting tests were carried out on 7075-T6 and AC3A materials which easily wear out the tool. In dry and wet cutting of 7075-T6, crater wear occurs in the face and flank wear does in the side flank. In dry cutting of AC3A, tool deposits which form and adhere onto the face and the side flank protect them. The fact leads to triangular flank wear free from craters near the tool tip. In wet cutting of AC3A, grooving wear occurs in the part of depth of cut, because the chips including hard silicon particles directly rub the tool face.View full abstractDownload PDF (996K) -
Hiroaki YOKOBAYASHI1981Volume 31Issue 5 Pages 347-358
Published: May 30, 1981
Released on J-STAGE: July 23, 2008
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Hideo YOSHINAGA, Hiroaki KURISHITA1981Volume 31Issue 5 Pages 359-368
Published: May 30, 1981
Released on J-STAGE: July 23, 2008
JOURNAL FREE ACCESSDownload PDF (1543K)
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