Influence of thermal histories on intermediate temperature embrittlement of an Fe-17Cr alloy

The measurement uncertainty of reduction in area of metals in tensile testing system

“…The segregation of sulfur and phosphorus to grain boundaries induced the strain rate embrittlement in Fei17Cr stainless steel shown in Fig. 7 [3,4]. It was concluded by Nagasaki et al that segregation of sulfur to grain boundaries causes fragile grain boundaries, which leads to strain rate embrittlement in Fig.…”

“…3 and is a modified form of experimental results shown in Fig. 3 [3,4]. It shows that the reduction in area varies with strain rate for Fe17Cr stainless steel tensile tested at temperatures 923 K and 873 K with 5 strain rates respectively, a kind of measurement uncertainty relative to strain rate.…”

“…It is shown that for each strain rate reduction in area will vary with the variation of test temperature, a measurement uncertainty relative to temperature. For each strain rate there is an intermediate temperature at which embrittlement reaches a maximum (a minimum of reduction in area) [3,4]. This temperature will reduce with decrease in strain rate.…”

“…Uncertainty relative to temperature -intermediate temperature embrittlement Fig. 3 shows tensile test results by Sun et al [3,4] with five strain rates at different temperatures for Fe17Cr stainless steel. It is shown that for each strain rate reduction in area will vary with the variation of test temperature, a measurement uncertainty relative to temperature.…”

“…That has been verified experimentally in Refs. [3,4,9,11,12], respectively. The segregation of Cu to grain boundaries plays a important role on the strain rate embrittlements shown in Figs.…”