The damage and fracture in hot spinning of titanium alloy is a very complex process under the combined effects microstructure evolution stress state. In this study, their dependences on processing parameters were investigated by an integrated FE model considering evolution, revealing states evolution. results show that inner surface workpiece with largest voids volume fraction place greatest po...

Cation-disordered rocksalt (DRX) materials have emerged as a class of novel high-capacity cathodes for Li-ion batteries. However, the commercialization DRX will require reducing their capacity decay, which has been associated with oxygen loss during cycling. Recent studies show that fluorination can effectively reduce and improve cycling stability; however, underlying atomic-scale mechanisms re...

Dynamic recrystallisation (DRX) is an important aspect for industrial applications in hot metal working. Although DRX has been known for more than thirty years, its mechanisms have never been precisely investigated, in part because it was not readily possible to make local texture measurements. In the present work, the material behaviour during DRX is investigated and modelled based on the micr...

This study aims to formulate a constitutive equation accurately determine the flow stress of superalloy 718 for effective production gas turbine disks. A hot-compression test with at temperatures ranging from 900 1000°C, reduction rate 67%, and strain rates 0.1, 1, 10 s−1, respectively, was conducted analyze in dynamic precipitation region. An accurate curve obtained each initial temperature. T...

Hot compression tests were performed on the samples of AISI 630 stainless steel in temperature range 900-1050 °C and at strain rates 10–3- 1 s−1. Single peak stress flow behavior was observed all deformation conditions. An irregular relationship found between point curves processing condition, i.e., rate. The relaxation revealed that dynamic precipitation (DP) carbides matrix grain boundaries c...

The complexity of hot deformation behaviours metallic materials is acknowledged in decades study. present work uses a new constitutive model by Zhu-Ou-Popov (ZOP model) and its modifications to predict the metals. ZOP are introduced firstly. basic idea these models centred on set piecewise transition functions: functions used flow stress at different strain ranges, whilst enable smooth shifting...

Abstract The high nitrogen austenitic stainless steel is widely used as power generation and geological exploration equipment materials because of its excellent strength, corrosion resistance non-magnetic. In this paper, the mechanical behavior microstructure evolution P550 in range 900 °C–1200 °C 0.001–10 s −1 deformation conditions were studied by physical heat treatment simulations, metallog...

Abstract The recovery and recrystallization behaviors of the high-temperature ? -phase carbon steel during deformation strongly affect mechanical properties steel. However, it is difficult to evaluate such at a high temperature. This study proposes behavior low-carbon based on quantitative observation dislocation density vacancies in Ni–30 mass pct Fe alloy. alloy was used because its stacking ...

Due to the complex composition and high proportion of alloys in traditional ultrahigh strength steel, dilemma caused by low toughness casting forging processes requiring subsequent heat treatment can be mitigated with an efficient economical rolling process. In this work, effect deformation parameters on dynamic recrystallization (DRX) recovery (DRV) is discussed through stress-strain analysis,...