リンク集 RSS/ATOM 記事

The private equity-backed chain is accused of displacing independents by selling sourdough at scale

Genetic largesse from some of Silicon Valley’s elite appears to be a mix of narcissism, altruism and dreams of immortality

Step into the chancellor’s shoes and devise your Budget plan

‘Generals’ Plan’ calls for closed military zone and evacuation, with those remaining treated as combatants and denied aid

Influential governor says US economy in ‘sweet spot’ but hotter than expected inflation not welcome

Industry adopts low-carbon goals it once shunned as natural disaster losses exceed $100bn a year

Reduced majority could impair the prime minister’s ability to tackle economic and demographic challenges

Sales of top brands on DeWu make up estimated 70% of country’s grey market as consumers hunt for lower prices

タイトル: Real-time Observation of Stress-strain Behavior beyond Necking in Martensitic Steel by in-situ Synchrotron X-ray Diffraction著者: Lavakumar, Avala; Hwang, Sukyoung; Okada, Kazuho; Park, Myeong-heom; Chokshi, Atul Haris; Tsuji, Nobuhiro抄録: In general, the stress-strain relationship of materials obtained by standard uniaxial tensile test, which can identify the hardening behavior only up to necking. Beyond necking, the material behavior is usually estimated by extrapolating or numerical modelling based on hardening behavior prior to the uniform elongation. This study investigated the post-necking hardening behavior of a fully martensitic steel by in-situ synchrotron X-ray diffraction during tensile deformation. From the in-situ results, the dislocation density, lattice strain and phase stress were calculated within the necked region and outside the necked region. A near steady-state flow with some hardening was observed within the necked region of a martensitic steel. ...