2026-10-14T11:20:57Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34037222 2026-10-01T00:00:02Z category_1 category_915 category_39 category_45 category_128 category_132 portal_87 item_type_6 month_year_10_2026

Heterostructure triggers inverse grain size effect on TRIP for strong and ductile stainless steel Dongmei Zhang (89650) Yiqun Su (8159994) Shuaizhuo Wang (25147061) Hui Song (53547) Jiajun Hu (2275711) Qingquan Lai (19184533) Yusheng Li (728469) Yuntian Zhu (1908205) Biophysics Physical Sciences not elsewhere classified Ecology Sociology Hematology Infectious Diseases Austenitic stainless steel heterogeneous lamellar structure strength and ductility progressive TRIP effect warm rolling <p>In high-strength nanostructured metastable austenitic stainless steels (ASS), transformation induced plasticity (TRIP), a key ductility-enhancing mechanism, is often suppressed, causing drastic loss of ductility. Here, a heterogeneous lamellar structure is shown to induce an inverse grain-size effect on TRIP. The structure consists of soft ultrafine-grained lamellae and hard nanoscale lamellae. During tensile deformation, martensitic transformation initiates first in the hard nano-lamellae and subsequently in the soft ultrafine-grained lamellae, thereby prolonging TRIP and increasing the final martensite fraction, both of which enhance the ductility. Produced by one-step warm rolling, this heterostructure provides an industrially promising route to strong and tough ASS.</p> 2026-10-01T00:00:02Z Text Journal contribution 10.6084/m9.figshare.34037222.v1 https://figshare.com/articles/journal_contribution/Heterostructure_triggers_inverse_grain_size_effect_on_TRIP_for_strong_and_ductile_stainless_steel/34037222 CC BY 4.0