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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Effects of boron (B) addition on martensitic transformation temperature, stress for inducing martensite and slip stress of a Ti-24 mol%Nb-3mol%Al (TiNbAl) superelastic alloy were investigated in a composition range from 0 to 0.10mass%B. It was found that a second phase is formed by the B addition being higher than 0.05 mass%B. This second phase was estimated to be TiB. The averaged grain size of TiNbAl was decreased by the B addition being higher than 0.05 mass%B. This decrease must be explained by the suppression of grain growth by the second phase. The second phase plays a role of pining sites of grain boundary movement during the solution treatment. The martensitic transformation temperatures (M s ) measured by differential scanning calorimetry were decreased by the B addition. Superelastic behavior was evaluated by a cyclic loading-unloading tensile test at room temperature with a constant strain increment of 1%, and it was found that superelasticity appeared regardless of the amount of B addition. It was also found that stress for inducing martensitic transformation (σ SIM ) increased with increasing B concentration up to 0.05 mass%B. This increase of σ SIΜ by the B addition can be explained by the lowering of M s by the B addition. The critical stress for slip (σ SLIP ) increased with increasing the B concentration being up to 0.05 mass%B. The increase of σ SLIP by B addition was evaluated to be 3GPa/mass%B, and it was significantly higher than that of σ SIM (500MPa/mass%B) when the B concentration was less than 0.05 mass%B. These results indicate that B addition is effective to reduce the permanent unrecoverable strain introduced during deformation.

materials transactions

Effect of Boron Concentration on Martensitic Transformation Temperatures, Stress for Inducing Martensite and Slip Stress of Ti-24 mol%Nb-3 mol%Al Superelastic Alloy