Coarsening of second phase in a two-phase Zr–2.5Nb: On the role of phase boundaries

Role of grain/phase boundary nature on the formation of hydrides in Zr–2.5%Nb alloy

“…However, in the present study, experimental evidence shows the formation of hydrides along the a/b interfaces which are related by Burger's OR. Such interfaces are expected to be low energy interfaces, due to relatively higher atomic matching across the interface [21][22][23]. Hence the governing factors for the selection of a/b interfaces as preferred hydride nucleation sites have to be more than mere boundary/interface energy.…”

Deformed microstructures of two-phase Zr–2.5Nb alloy: Effects of the second phase hardness

“…The classical two-phase microstructure of Zr-2.5Nb pressure tube [26][27][28] consists of hcp (hexagonal closed packed) a grains and near continuous filaments of bcc (body centered cubic) b [10,25,29]. The b size and morphology can be controlled significantly through heat-treatments [29,30]. The b is expected to be soft [10,25], though literature [31] does present us with possibilities on hard b as well.…”

“…In the present study, cold rolled Zr-2.5Nb was given suitable heat-treatments [30]. The aim was to obtain nearly identical microstructures, hcp a with grain boundary bcc b, but microstructures with hard and soft b respectively.…”

Origin of Microstructural Irreversibility in Ni-Ti Based Shape Memory Alloys during Thermal Cycling

“…[42] In this study, between the austenite and martensite phase an approximate OR of 40 deg 001 h i (apparent in the misorientation distribution functions of Figure 7(a)) was observed by the microtexture measurements. Such an OR characterizes a phase boundary, [46] except its tilt and twist nature. [42] It needs to be pointed out that 40 deg 001 h i OR has 24 variants.…”