アルミニウム合金6063管の引張試験片の寸法について
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概要
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Tensile tests were carried out on the nine kinds of 6063 tubes, that is, of the outer diameter D = 20, 30 and 50mm each with thickness t = 1, 2 and 3mm.The principal results obtained were as follows.1) Proportional test pieces with a constant value of L0/A (L0: gauge length. A: cross-sectional area) are appropriate for tubular specimens in the same way for both circular and rectangular section test pieces.2) The length of the neck, which was measured along the specimen before the test, was nearly equal to 2D independent of wall thickness of tube.3) The tubular specimens were plugged at each end for gripping. The length of the constrained region by the shoulder of the plug was about (0.61.0) D independent of wall thickness of tubes.4) The length of tubular specimen between the shoulders of the plugs, Lc, should preferably be in the range of Lc5 D for the tension tests.5) The spiral fracture (Photo 1) occurred for the 6063-F tubular specimen in the range of D/t>206) Tensile strength of a curved strip specimen cut from the tube was almost identical to that of a tubular specimen.7) The elongation percentage of a curved strip specimen cut from the tube was nearly equal to that of a tubular specimen when L0/√A was larger than ten.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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