English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Several heats of T91 steel and P91 steel were evaluated, focusing on the distribution of segregation and its effect on creep strength. The difference between the maximum and minimum Cr content, ΔCr, at a constant distance (x) was estimated in the range of 1 mm along the wall thickness direction for T91 steels. The standard deviation of ΔCr was employed as an indicator of the degree of segregation. The standard deviation correlated with time to rupture at 650°C when the Cr content is relatively high. However, no clear correlation between them was observed when the Cr content is very low in the range of specification. In addition to Cr segregation, the Cr content itself should be considered as a cause of reduced creep strength when the Cr content is low. For P91 steel, the distribution of segregation was inhomogeneous as compared with T91 steel. For example, a strongly segregated area was confirmed at the position of 3/4 t from the outer surface of the pipe. On the other hand, no segregation band was observed in other areas of the same pipe.

Effect of Cr segregation on creep strength in grade 91 steels