Effect of Wire Diameter and Grain Size on Tensile Properties of Austenitic Stainless Steel Wire

Effects of Specimen Thickness in Tensile Tests on Elongation and Deformation Energy for Industrially Pure Iron

“…Yuji TAKEDA, 1) * Chatcharit KIATTISAKSRI, 1) Masatoshi ARAMAKI, 2) Shinji MUNETOH 2) and Osamu FURUKIMI Industrial pure iron specimens with a thickness that varied from 0.2 to 2.0 mm were investigated in tensile tests to examine the influence of specimen thickness on the percentage elongation and deformation energy.…”

“…However, it is necessary to contain five or more crystal grains in the transverse direction for obtaining the constant strengths. 1) On the other hand, the percentage total elongation (El tot : ratio of gauge length, L 0 and total displacement, ΔL in tensile test), is influenced by the dimension of specimen. In 1880, Barba discovered that the displacement in the uniform deformation is proportional to the gauge length, and the displacement in the local necking deformation is proportional to the square root of the cross-sectional area of the test specimen.…”

Effects of Thickness and Grain Size on Tensile Properties of Pure Titanium Thin Gauge Sheets

“…They decreased sharply with decreasing t/d GS less than 3. Fukumaru et al suggested that this sharp decrease is caused by the decrease of work-hardening rate which and brittle fracture [6]. Fig.6 shows stress-strain curves.…”

“…In addition, PS of each sheet was on the same line irrespective of thickness as shown in Fig.2(a). Meanwhile, clear t/d GS dependence on PS beyond sheet thickness was not recognized as shown in Fig.2(b) unlike in pure iron sheet and austenitic stainless wire in which clear relationships between YS and t/d GS (or D/d GS ) are observed [5] [6].…”

“…In addition, they reported that YS in pure iron and copper alloy sheets decreases with decreasing thickness in the range of t/d GS less than approximately 10 and 5, respectively. Fukumaru et al [6] reported that YS and elongation (EL) of Fe18Cr-12Ni thin gauge wire of 0.1-1mm in diameter also decrease with decreasing diameter (D) in the range of D/d GS less than approximately 5. Similar investigation results are also expected in other kinds of metallic materials including titanium sheets/foils with thickness smaller than those of the general products, and it is quite important to investigate the dependence of t/d GS on mechanical properties in pure titanium thin sheets in detail from the viewpoints of future expansion of application range of titanium thin gauge sheets/foils.…”