Research on residual stress inside Fe-Mn-Si shape memory alloy coating by laser cladding processing

Ju, Heng; Chen, Lin; Zhang, Jiaqi; Liu, Zhijie

doi:10.1007/s11801-016-6131-1

Cited by 5 publications

(1 citation statement)

References 7 publications

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“…Li [14], J. senthil selban [15] and P. A. Molian [16] used BN powder with higher mass fraction (more than 5%) and titanium alloy powder to prepare composite coating with high microhardness and good wear resistance on different kinds of titanium. Ceramic phase and solid solution strengthening effect are beneficial to coating wear resistance, but microstructure instability and high residual stress also affect the performance of composite coating [17,18]. To adjust microstructure instability and eliminate residual stress, aging treatment is carried out necessarily [19,20].…”

Section: Introductionmentioning

confidence: 99%

Effect of aging on microstructure and wear resistance of Ti-55511/BN composite coating

Chen

Wang²,

He³

et al. 2020

Surface Engineering

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In situ synthesized TiN and TiB reinforced metal matrix composite coating was fabricated on Ti-55511 by laser cladding with Ti-55511/BN powder mixture (2 wt-% BN). Results indicated that coating was mainly composed of TiB, dendrite TiN and α phase. The diameter of small-sized hollow tubular TiB was less than 400 nm, and the width of the other rod-shaped TiB was less than 1 μm. The flower-like structure formed during solidification consisted of TiN dendrite in centre and rod-shaped or hollow tubular TiB at edge. Coating had high hardness (540 HV) due to formation of TiB and TiN. After direct aging (600°C/5 h/AC), the hardness of coating and HAZ increased to 660 and 450 HV respectively because of nano-scaled α phase precipitation. In the friction and wear test, the weight loss of the coating was only 62% of that of substrate, which further reduced to 47% after aging.

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