Details

Autor(en) / Beteiligte

• Shi, Zhang‐Zhi
• Li, Meng
• Li, Xiang‐Min
• Wang, Lu‐Ning

Titel

Surface‐Roughness‐Induced Plasticity in a Biodegradable Zn Alloy

Ist Teil von

• Advanced materials (Weinheim), 2023-12, Vol.35 (50), p.e2207570-n/a

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Improving plasticity has been an eternal theme of developing metallic materials. It is difficult to increase room‐temperature elongation of metallic materials over 100% without sacrificing strength using existing methods. Herein, surface‐roughness‐induced plasticity (SRIP) is discovered in biodegradable Zn–0.4Mn alloy. Surprisingly, in the good surface range that meets the international standard ISO 6892, reducing surface roughness results in significant increase in plasticity without loss of strength. From unground to 5000# sandpaper ground states, the surface roughness Ra of the alloy decreases from 0.63 to 0.05 µm, while its room temperature elongation increases from 74% to 143%. SRIP is the synergistic result of increased microstructure damage tolerance and decreased surface roughness. It provides a new method for improving plasticity. Surface‐roughness‐induced plasticity (SRIP) solves the dilemma of significantly improving plasticity at the expense of strength. From the unground state to the 5000# sandpaper ground state, room‐temperature elongation of biodegradable Zn–0.4Mn alloy increases from 74% to 143% without loss of strength. SRIP is the synergistic result of increased microstructure damage tolerance and decreased surface roughness.