Photo of Jinghao Xu

Jinghao Xu

Principal Research Engineer

Building high-performance engineering materials through physics-driven design and sustainable manufacturing.

Briefly about me and my research

I am a Principal Research Engineer and Docent in Engineering Materials. My work spans physical metallurgy, additive manufacturing, and the mechanical behaviour of metals, alloys, and other engineering materials. 

My research focuses on 4 parts of materials science and engineering: structure, properties, modelling, and processing. I have developed a model that captures how chemical composition governs the processability of superalloys during additive manufacturing. I characterise materials across multiple length scales using complementary microscopy techniques and large-scale research infrastructure, and I design and perform mechanical testing under static and cyclic loading across a wide temperature range to understand how these materials ultimately fail.

More recently, my focus has shifted towards process monitoring, with particular emphasis on the signals generated during additive manufacturing that carry rich process information yet are typically overlooked. These signals are closely linked to the formation of defects and anomalies.

My research is committed to creating high-performance engineering materials through a deeper understanding of the underlying physics and through sustainable manufacturing.

Research in additive manufacturing and engineering materials

My research connects different facets of engineering materials: chemical composition, grain structure, phase transformation, crystallographic arrangement, and process monitoring of additive manufacturing.

A few examples follow:

Image not found

Process monitoring of additive manufacturing 

Thermionic electron emission, the release of charged particles from a hot body, was first observed more than 170 years ago and theorised more than 120 years ago. Yet this important electron–matter interaction has been overlooked in modern electron-beam powder-bed fusion systems.

 

I have shown that thermionic electron emission can be nicely captured and used as an effective medium for process monitoring, an approach named as In-Melt Electron Analysis (IMEA). The information it carries includes, among other things, the temperature field, melt-pool dynamics, and process anomalies (Xu J, et al. Addit Manuf. 2025;109:104858.). Beyond this, the physical transformations of matter during electron-beam interaction such as heating, oxide evaporation, melting, and spattering, are also clearly reflected in the IMEA signal (Xu J, et al. Materialia 2024:102243.).

Image not found

Modelling the additive manufacturability of superalloys 

Producing crack-free nickel-based superalloys by additive manufacturing is challenging: these alloys are susceptible to hot cracking, and their cracking susceptibility is difficult to quantify. To address this, I developed a two-parameter Heat-Resistance–Deformation-Resistance (HR–DR) model. By relating chemical composition (both major and minor elements) to cracking susceptibility, the HR–DR model offers a practical tool for alloy development. Related reading: Xu J, et al. Acta Mater. 2022;240:118307., Xu J, et al. Results Mater. 2021;12:100232., Xu J, et al. Materials (Basel). 2020;13(21):4930.

Image not found

Strain-age cracking and phase transformation 

Post-processing can enhance mechanical properties, but it is not always safe. Because the gamma-prime phase forms early and rapidly, superalloys become prone to a macroscopic, catastrophic form of failure known as strain-age cracking. In-situ monitoring confirms that achieving post-processing free of macroscopic cracking is, unfortunately, far from straightforward. Related reading: Xu J, et al. Acta Mater. 312 (2026) 122244.

A series of diagrams showing different types of materials.

Post-processing and microstructural control 

Post-additive-manufacturing processing tailors the grain structure: the evolution of crystallographic texture can be tracked by neutron diffraction (Xu J, et al. Mater Charact. 2022:111742.). Designing this crystalline arrangement is critical, because grain-boundary sliding is a common operative deformation mode at elevated temperature (Xu J, et al. Acta Mater. 2019;179:142-157.). The resulting mechanical properties can be further tuned through the size and morphology of the strengthening precipitates (Xu J, et al. Addit Manuf. 2021;48:102416.; Xu J, et al. Materialia. 2020;10:100657.).

Short CV

Education

  • June 2022: PhD in Engineering Materials, supervisors: Professor Johan Moverare, Professor Emerita Ru Peng, Linköping University, Sweden
  • May 2018: Master in Materials Science and Engineering, Central South University, China
  • June 2015: Bachelor in Mineral Processing Engineering, Central South University, China

Appointments

  • April 2026 – : Docent in engineering materials, Faculty of Science and Engineering at Linköping University, Sweden
  • 2022– : Principal Research Engineer, Linköping University, Sweden

 

Publications

Jinghao Xu, Abdul Shaafi Shaikh, Henry Boyle, Sofia Kazi, Justinas Palisaitis, Ru Peng, Eduard Hryha, Johan Moverare (2026)

Acta Materialia , Vol.312 Continue to DOI

Jinghao Xu, Pritwish Tarafder, Anton Wiberg, Huotian Zhang, Johan Moverare (2025)

Additive Manufacturing , Vol.109 Continue to DOI

Jinghao Xu, Paraskevas Kontis, Ru Peng, Johan Moverare (2022)

Acta Materialia , Vol.240 Continue to DOI

2026

Jinghao Xu, Abdul Shaafi Shaikh, Henry Boyle, Sofia Kazi, Justinas Palisaitis, Ru Peng, Eduard Hryha, Johan Moverare (2026) Strain-age cracking of a ?'-strengthened nickel-based superalloy additively manufactured by laser powder bed fusion Acta Materialia, Vol. 312, Article 122244 (Article in journal) https://dx.doi.org/10.1016/j.actamat.2026.122244
Ahmed Fardan, Jakob Schroder, Jinghao Xu, Hakan Brodin, Eduard Hryha (2026) Role of scan strategies in modulating micro and macro-cracking in CM247LC processed by powder bed fusion-laser beam Progress in Additive Manufacturing (Article in journal) https://dx.doi.org/10.1007/s40964-026-01701-z
Karin Wennersten, Jinghao Xu, Erik Granhed, Anton Wiberg, Hossein Nadali Najafabadi, Johan Moverare (2026) Tailoring grain structure and mechanical properties of Ti6Al4V via EB-PBF using an advanced point melt strategy Materials Science & Engineering: A, Vol. 960, Article 150119 (Article in journal) https://dx.doi.org/10.1016/j.msea.2026.150119
Ahmed Fardan, Jinghao Xu, A. Shaafi Shaikh, Johannes Gardstam, Uta Klement, Johan Moverare, Hakan Brodin, Eduard Hryha (2026) On the anisotropic creep behavior of a Ni-base superalloy CM247LC manufactured by powder bed fusion-laser beam Materials Science & Engineering: A, Vol. 953, Article 149707 (Article in journal) https://dx.doi.org/10.1016/j.msea.2025.149707
Yuan Tian, Jinghao Xu, Ru Peng, Mattias Calmunger, Johan Moverare (2026) Enhanced fatigue resistance of cold-drawn AISI 316L via stress relieving heat treatment promoting metastable phase transformation Materials Science & Engineering: A, Vol. 953, Article 149715 (Article in journal) https://dx.doi.org/10.1016/j.msea.2025.149715

News

Co-workers at the division Engineering Materials

Organisation